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Finding the Fourth Proportional to 559,782.11, 772,470.17 and 318,031.13

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Solution

The fourth proportional to 559,782.11, 772,470.17 and 318,031.13 is: 438,866.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,782.11 : 772,470.17 = 318,031.13 : x
  2. Step 2: Convert to fraction form
    559,782.11/772,470.17 = 318,031.13/x
  3. Step 3: Cross multiply
    559,782.11x = 772,470.17 × 318,031.13
  4. Step 4: Simplify right side
    559,782.11x = 245,669,555,603.89
  5. Step 5: Solve for x
    x = 245,669,555,603.89/559,782.11
  6. Step 6: Final answer
    x = 438,866.40

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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.