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Finding the Fourth Proportional to 559,782.36, 772,470.50 and 318,031.38

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Solution

The fourth proportional to 559,782.36, 772,470.50 and 318,031.38 is: 438,866.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,782.36 : 772,470.50 = 318,031.38 : x
  2. Step 2: Convert to fraction form
    559,782.36/772,470.50 = 318,031.38/x
  3. Step 3: Cross multiply
    559,782.36x = 772,470.50 × 318,031.38
  4. Step 4: Simplify right side
    559,782.36x = 245,669,859,124.29
  5. Step 5: Solve for x
    x = 245,669,859,124.29/559,782.36
  6. Step 6: Final answer
    x = 438,866.74

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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.