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Finding the Fourth Proportional to 498,920.66, 688,509.34 and 272,567.78

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Solution

The fourth proportional to 498,920.66, 688,509.34 and 272,567.78 is: 376,142.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,920.66 : 688,509.34 = 272,567.78 : x
  2. Step 2: Convert to fraction form
    498,920.66/688,509.34 = 272,567.78/x
  3. Step 3: Cross multiply
    498,920.66x = 688,509.34 × 272,567.78
  4. Step 4: Simplify right side
    498,920.66x = 187,665,458,189.10
  5. Step 5: Solve for x
    x = 187,665,458,189.10/498,920.66
  6. Step 6: Final answer
    x = 376,142.89

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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.