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Finding the Fourth Proportional to 709,903.06, 979,658.78 and 387,612.16

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Solution

The fourth proportional to 709,903.06, 979,658.78 and 387,612.16 is: 534,900.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,903.06 : 979,658.78 = 387,612.16 : x
  2. Step 2: Convert to fraction form
    709,903.06/979,658.78 = 387,612.16/x
  3. Step 3: Cross multiply
    709,903.06x = 979,658.78 × 387,612.16
  4. Step 4: Simplify right side
    709,903.06x = 379,727,655,778.77
  5. Step 5: Solve for x
    x = 379,727,655,778.77/709,903.06
  6. Step 6: Final answer
    x = 534,900.72

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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.