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Finding the Fourth Proportional to 715,034.13, 986,754.22 and 388,353.52

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Solution

The fourth proportional to 715,034.13, 986,754.22 and 388,353.52 is: 535,931.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,034.13 : 986,754.22 = 388,353.52 : x
  2. Step 2: Convert to fraction form
    715,034.13/986,754.22 = 388,353.52/x
  3. Step 3: Cross multiply
    715,034.13x = 986,754.22 × 388,353.52
  4. Step 4: Simplify right side
    715,034.13x = 383,209,477,158.90
  5. Step 5: Solve for x
    x = 383,209,477,158.90/715,034.13
  6. Step 6: Final answer
    x = 535,931.73

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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.