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Finding the Fourth Proportional to 715,498.47, 987,448.50 and 486,563.63

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Solution

The fourth proportional to 715,498.47, 987,448.50 and 486,563.63 is: 671,499.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,498.47 : 987,448.50 = 486,563.63 : x
  2. Step 2: Convert to fraction form
    715,498.47/987,448.50 = 486,563.63/x
  3. Step 3: Cross multiply
    715,498.47x = 987,448.50 × 486,563.63
  4. Step 4: Simplify right side
    715,498.47x = 480,456,521,660.81
  5. Step 5: Solve for x
    x = 480,456,521,660.81/715,498.47
  6. Step 6: Final answer
    x = 671,499.02

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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.