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Finding the Fourth Proportional to 709,904.06, 979,660.16 and 387,613.16

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Solution

The fourth proportional to 709,904.06, 979,660.16 and 387,613.16 is: 534,902.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,904.06 : 979,660.16 = 387,613.16 : x
  2. Step 2: Convert to fraction form
    709,904.06/979,660.16 = 387,613.16/x
  3. Step 3: Cross multiply
    709,904.06x = 979,660.16 × 387,613.16
  4. Step 4: Simplify right side
    709,904.06x = 379,729,170,343.71
  5. Step 5: Solve for x
    x = 379,729,170,343.71/709,904.06
  6. Step 6: Final answer
    x = 534,902.10

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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.