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Finding the Fourth Proportional to 709,488.96, 979,088.49 and 387,188.34

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Solution

The fourth proportional to 709,488.96, 979,088.49 and 387,188.34 is: 534,316.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,488.96 : 979,088.49 = 387,188.34 : x
  2. Step 2: Convert to fraction form
    709,488.96/979,088.49 = 387,188.34/x
  3. Step 3: Cross multiply
    709,488.96x = 979,088.49 × 387,188.34
  4. Step 4: Simplify right side
    709,488.96x = 379,091,647,156.21
  5. Step 5: Solve for x
    x = 379,091,647,156.21/709,488.96
  6. Step 6: Final answer
    x = 534,316.48

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Double scale
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Similar ratio
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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.