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Finding the Fourth Proportional to 715,499.47, 987,449.88 and 486,564.63

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Solution

The fourth proportional to 715,499.47, 987,449.88 and 486,564.63 is: 671,500.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,499.47 : 987,449.88 = 486,564.63 : x
  2. Step 2: Convert to fraction form
    715,499.47/987,449.88 = 486,564.63/x
  3. Step 3: Cross multiply
    715,499.47x = 987,449.88 × 486,564.63
  4. Step 4: Simplify right side
    715,499.47x = 480,458,185,505.74
  5. Step 5: Solve for x
    x = 480,458,185,505.74/715,499.47
  6. Step 6: Final answer
    x = 671,500.41

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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.