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Finding the Fourth Proportional to 559,781.36, 772,469.12 and 318,030.38

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Solution

The fourth proportional to 559,781.36, 772,469.12 and 318,030.38 is: 438,865.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,781.36 : 772,469.12 = 318,030.38 : x
  2. Step 2: Convert to fraction form
    559,781.36/772,469.12 = 318,030.38/x
  3. Step 3: Cross multiply
    559,781.36x = 772,469.12 × 318,030.38
  4. Step 4: Simplify right side
    559,781.36x = 245,668,644,704.60
  5. Step 5: Solve for x
    x = 245,668,644,704.60/559,781.36
  6. Step 6: Final answer
    x = 438,865.36

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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.