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Finding the Fourth Proportional to 709,908.59, 979,713.54 and 387,648.60

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Solution

The fourth proportional to 709,908.59, 979,713.54 and 387,648.60 is: 534,976.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,908.59 : 979,713.54 = 387,648.60 : x
  2. Step 2: Convert to fraction form
    709,908.59/979,713.54 = 387,648.60/x
  3. Step 3: Cross multiply
    709,908.59x = 979,713.54 × 387,648.60
  4. Step 4: Simplify right side
    709,908.59x = 379,784,582,182.04
  5. Step 5: Solve for x
    x = 379,784,582,182.04/709,908.59
  6. Step 6: Final answer
    x = 534,976.74

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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.