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Finding the Fourth Proportional to 559,782.61, 772,470.85 and 318,031.63

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Solution

The fourth proportional to 559,782.61, 772,470.85 and 318,031.63 is: 438,867.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,782.61 : 772,470.85 = 318,031.63 : x
  2. Step 2: Convert to fraction form
    559,782.61/772,470.85 = 318,031.63/x
  3. Step 3: Cross multiply
    559,782.61x = 772,470.85 × 318,031.63
  4. Step 4: Simplify right side
    559,782.61x = 245,670,163,552.99
  5. Step 5: Solve for x
    x = 245,670,163,552.99/559,782.61
  6. Step 6: Final answer
    x = 438,867.09

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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.