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Finding the Fourth Proportional to 638,658.56, 881,328.64 and 352,190.72

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Solution

The fourth proportional to 638,658.56, 881,328.64 and 352,190.72 is: 486,012.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,658.56 : 881,328.64 = 352,190.72 : x
  2. Step 2: Convert to fraction form
    638,658.56/881,328.64 = 352,190.72/x
  3. Step 3: Cross multiply
    638,658.56x = 881,328.64 × 352,190.72
  4. Step 4: Simplify right side
    638,658.56x = 310,395,768,278.22
  5. Step 5: Solve for x
    x = 310,395,768,278.22/638,658.56
  6. Step 6: Final answer
    x = 486,012.07

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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.