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Finding the Fourth Proportional to 709,553.93, 979,187.13 and 387,271.13

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Solution

The fourth proportional to 709,553.93, 979,187.13 and 387,271.13 is: 534,435.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,553.93 : 979,187.13 = 387,271.13 : x
  2. Step 2: Convert to fraction form
    709,553.93/979,187.13 = 387,271.13/x
  3. Step 3: Cross multiply
    709,553.93x = 979,187.13 × 387,271.13
  4. Step 4: Simplify right side
    709,553.93x = 379,210,901,420.62
  5. Step 5: Solve for x
    x = 379,210,901,420.62/709,553.93
  6. Step 6: Final answer
    x = 534,435.63

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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.