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Finding the Fourth Proportional to 684,712.08, 944,885 and 378,780.56

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Solution

The fourth proportional to 684,712.08, 944,885 and 378,780.56 is: 522,707.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,712.08 : 944,885 = 378,780.56 : x
  2. Step 2: Convert to fraction form
    684,712.08/944,885 = 378,780.56/x
  3. Step 3: Cross multiply
    684,712.08x = 944,885 × 378,780.56
  4. Step 4: Simplify right side
    684,712.08x = 357,904,069,435.60
  5. Step 5: Solve for x
    x = 357,904,069,435.60/684,712.08
  6. Step 6: Final answer
    x = 522,707.40

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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.