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Finding the Fourth Proportional to 638,608.72, 881,339.16 and 366,712.24

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Solution

The fourth proportional to 638,608.72, 881,339.16 and 366,712.24 is: 506,096.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,608.72 : 881,339.16 = 366,712.24 : x
  2. Step 2: Convert to fraction form
    638,608.72/881,339.16 = 366,712.24/x
  3. Step 3: Cross multiply
    638,608.72x = 881,339.16 × 366,712.24
  4. Step 4: Simplify right side
    638,608.72x = 323,197,857,563.32
  5. Step 5: Solve for x
    x = 323,197,857,563.32/638,608.72
  6. Step 6: Final answer
    x = 506,096.84

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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.