Home / 687,429.15-948,437.60-397,003.47

Finding the Fourth Proportional to 687,429.15, 948,437.60 and 397,003.47

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Solution

The fourth proportional to 687,429.15, 948,437.60 and 397,003.47 is: 547,740.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,429.15 : 948,437.60 = 397,003.47 : x
  2. Step 2: Convert to fraction form
    687,429.15/948,437.60 = 397,003.47/x
  3. Step 3: Cross multiply
    687,429.15x = 948,437.60 × 397,003.47
  4. Step 4: Simplify right side
    687,429.15x = 376,533,016,293.46
  5. Step 5: Solve for x
    x = 376,533,016,293.46/687,429.15
  6. Step 6: Final answer
    x = 547,740.83

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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.