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Finding the Fourth Proportional to 715,586.48, 987,508.68 and 393,317.36

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Solution

The fourth proportional to 715,586.48, 987,508.68 and 393,317.36 is: 542,777.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,586.48 : 987,508.68 = 393,317.36 : x
  2. Step 2: Convert to fraction form
    715,586.48/987,508.68 = 393,317.36/x
  3. Step 3: Cross multiply
    715,586.48x = 987,508.68 × 393,317.36
  4. Step 4: Simplify right side
    715,586.48x = 388,404,306,994.69
  5. Step 5: Solve for x
    x = 388,404,306,994.69/715,586.48
  6. Step 6: Final answer
    x = 542,777.59

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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.