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Finding the Fourth Proportional to 689,731.86, 951,820.83 and 387,925.86

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Solution

The fourth proportional to 689,731.86, 951,820.83 and 387,925.86 is: 535,332.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,731.86 : 951,820.83 = 387,925.86 : x
  2. Step 2: Convert to fraction form
    689,731.86/951,820.83 = 387,925.86/x
  3. Step 3: Cross multiply
    689,731.86x = 951,820.83 × 387,925.86
  4. Step 4: Simplify right side
    689,731.86x = 369,235,914,043.66
  5. Step 5: Solve for x
    x = 369,235,914,043.66/689,731.86
  6. Step 6: Final answer
    x = 535,332.55

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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.