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Finding the Fourth Proportional to 499,287.68, 689,032 and 272,945.28

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Solution

The fourth proportional to 499,287.68, 689,032 and 272,945.28 is: 376,672.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,287.68 : 689,032 = 272,945.28 : x
  2. Step 2: Convert to fraction form
    499,287.68/689,032 = 272,945.28/x
  3. Step 3: Cross multiply
    499,287.68x = 689,032 × 272,945.28
  4. Step 4: Simplify right side
    499,287.68x = 188,068,032,168.96
  5. Step 5: Solve for x
    x = 188,068,032,168.96/499,287.68
  6. Step 6: Final answer
    x = 376,672.69

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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.