Home / 638,977.09-881,774.18-352,497.10

Finding the Fourth Proportional to 638,977.09, 881,774.18 and 352,497.10

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Solution

The fourth proportional to 638,977.09, 881,774.18 and 352,497.10 is: 486,438.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,977.09 : 881,774.18 = 352,497.10 : x
  2. Step 2: Convert to fraction form
    638,977.09/881,774.18 = 352,497.10/x
  3. Step 3: Cross multiply
    638,977.09x = 881,774.18 × 352,497.10
  4. Step 4: Simplify right side
    638,977.09x = 310,822,837,337.96
  5. Step 5: Solve for x
    x = 310,822,837,337.96/638,977.09
  6. Step 6: Final answer
    x = 486,438.16

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Half scale
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Double scale
Find fourth proportional to 638,978.09, 881,775.55 and 352,498.10
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.