Home / 638,986.39-881,804.10-352,506.40

Finding the Fourth Proportional to 638,986.39, 881,804.10 and 352,506.40

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Solution

The fourth proportional to 638,986.39, 881,804.10 and 352,506.40 is: 486,460.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,986.39 : 881,804.10 = 352,506.40 : x
  2. Step 2: Convert to fraction form
    638,986.39/881,804.10 = 352,506.40/x
  3. Step 3: Cross multiply
    638,986.39x = 881,804.10 × 352,506.40
  4. Step 4: Simplify right side
    638,986.39x = 310,841,588,796.24
  5. Step 5: Solve for x
    x = 310,841,588,796.24/638,986.39
  6. Step 6: Final answer
    x = 486,460.42

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Double scale
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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.