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Finding the Fourth Proportional to 513,621.20, 717,670 and 513,621.20

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Solution

The fourth proportional to 513,621.20, 717,670 and 513,621.20 is: 717,670

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,621.20 : 717,670 = 513,621.20 : x
  2. Step 2: Convert to fraction form
    513,621.20/717,670 = 513,621.20/x
  3. Step 3: Cross multiply
    513,621.20x = 717,670 × 513,621.20
  4. Step 4: Simplify right side
    513,621.20x = 368,610,526,604
  5. Step 5: Solve for x
    x = 368,610,526,604/513,621.20
  6. Step 6: Final answer
    x = 717,670

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.