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Finding the Fourth Proportional to 709,474.44, 979,095.48 and 387,205.21

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Solution

The fourth proportional to 709,474.44, 979,095.48 and 387,205.21 is: 534,354.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,474.44 : 979,095.48 = 387,205.21 : x
  2. Step 2: Convert to fraction form
    709,474.44/979,095.48 = 387,205.21/x
  3. Step 3: Cross multiply
    709,474.44x = 979,095.48 × 387,205.21
  4. Step 4: Simplify right side
    709,474.44x = 379,110,866,047.97
  5. Step 5: Solve for x
    x = 379,110,866,047.97/709,474.44
  6. Step 6: Final answer
    x = 534,354.51

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Double scale
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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.