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Finding the Fourth Proportional to 709,939.07, 979,712.00 and 387,646.87

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Solution

The fourth proportional to 709,939.07, 979,712.00 and 387,646.87 is: 534,950.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,939.07 : 979,712.00 = 387,646.87 : x
  2. Step 2: Convert to fraction form
    709,939.07/979,712.00 = 387,646.87/x
  3. Step 3: Cross multiply
    709,939.07x = 979,712.00 × 387,646.87
  4. Step 4: Simplify right side
    709,939.07x = 379,782,288,821.28
  5. Step 5: Solve for x
    x = 379,782,288,821.28/709,939.07
  6. Step 6: Final answer
    x = 534,950.54

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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.