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Finding the Fourth Proportional to 661,688.48, 912,400.72 and 457,384.68

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Solution

The fourth proportional to 661,688.48, 912,400.72 and 457,384.68 is: 630,686.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,688.48 : 912,400.72 = 457,384.68 : x
  2. Step 2: Convert to fraction form
    661,688.48/912,400.72 = 457,384.68/x
  3. Step 3: Cross multiply
    661,688.48x = 912,400.72 × 457,384.68
  4. Step 4: Simplify right side
    661,688.48x = 417,318,111,348.97
  5. Step 5: Solve for x
    x = 417,318,111,348.97/661,688.48
  6. Step 6: Final answer
    x = 630,686.68

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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.