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Finding the Fourth Proportional to 709,767.16, 979,493.50 and 387,490.84

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Solution

The fourth proportional to 709,767.16, 979,493.50 and 387,490.84 is: 534,745.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,767.16 : 979,493.50 = 387,490.84 : x
  2. Step 2: Convert to fraction form
    709,767.16/979,493.50 = 387,490.84/x
  3. Step 3: Cross multiply
    709,767.16x = 979,493.50 × 387,490.84
  4. Step 4: Simplify right side
    709,767.16x = 379,544,759,089.54
  5. Step 5: Solve for x
    x = 379,544,759,089.54/709,767.16
  6. Step 6: Final answer
    x = 534,745.45

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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.