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Finding the Fourth Proportional to 559,910.20, 772,642.78 and 318,159.22

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Solution

The fourth proportional to 559,910.20, 772,642.78 and 318,159.22 is: 439,040.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,910.20 : 772,642.78 = 318,159.22 : x
  2. Step 2: Convert to fraction form
    559,910.20/772,642.78 = 318,159.22/x
  3. Step 3: Cross multiply
    559,910.20x = 772,642.78 × 318,159.22
  4. Step 4: Simplify right side
    559,910.20x = 245,823,424,223.43
  5. Step 5: Solve for x
    x = 245,823,424,223.43/559,910.20
  6. Step 6: Final answer
    x = 439,040.80

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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.