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Finding the Fourth Proportional to 559,781.55, 772,469.39 and 318,030.57

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Solution

The fourth proportional to 559,781.55, 772,469.39 and 318,030.57 is: 438,865.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,781.55 : 772,469.39 = 318,030.57 : x
  2. Step 2: Convert to fraction form
    559,781.55/772,469.39 = 318,030.57/x
  3. Step 3: Cross multiply
    559,781.55x = 772,469.39 × 318,030.57
  4. Step 4: Simplify right side
    559,781.55x = 245,668,878,819.10
  5. Step 5: Solve for x
    x = 245,668,878,819.10/559,781.55
  6. Step 6: Final answer
    x = 438,865.62

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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.