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Finding the Fourth Proportional to 709,769.90, 979,497.29 and 387,493.58

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Solution

The fourth proportional to 709,769.90, 979,497.29 and 387,493.58 is: 534,749.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,769.90 : 979,497.29 = 387,493.58 : x
  2. Step 2: Convert to fraction form
    709,769.90/979,497.29 = 387,493.58/x
  3. Step 3: Cross multiply
    709,769.90x = 979,497.29 × 387,493.58
  4. Step 4: Simplify right side
    709,769.90x = 379,548,911,502.40
  5. Step 5: Solve for x
    x = 379,548,911,502.40/709,769.90
  6. Step 6: Final answer
    x = 534,749.24

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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.