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Finding the Fourth Proportional to 709,763.15, 979,487.97 and 387,486.83

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Solution

The fourth proportional to 709,763.15, 979,487.97 and 387,486.83 is: 534,739.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,763.15 : 979,487.97 = 387,486.83 : x
  2. Step 2: Convert to fraction form
    709,763.15/979,487.97 = 387,486.83/x
  3. Step 3: Cross multiply
    709,763.15x = 979,487.97 × 387,486.83
  4. Step 4: Simplify right side
    709,763.15x = 379,538,688,518.44
  5. Step 5: Solve for x
    x = 379,538,688,518.44/709,763.15
  6. Step 6: Final answer
    x = 534,739.92

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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.