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Finding the Fourth Proportional to 709,903.81, 979,659.81 and 387,612.91

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Solution

The fourth proportional to 709,903.81, 979,659.81 and 387,612.91 is: 534,901.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,903.81 : 979,659.81 = 387,612.91 : x
  2. Step 2: Convert to fraction form
    709,903.81/979,659.81 = 387,612.91/x
  3. Step 3: Cross multiply
    709,903.81x = 979,659.81 × 387,612.91
  4. Step 4: Simplify right side
    709,903.81x = 379,728,789,764.15
  5. Step 5: Solve for x
    x = 379,728,789,764.15/709,903.81
  6. Step 6: Final answer
    x = 534,901.75

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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.