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Finding the Fourth Proportional to 559,782.71, 772,521.14 and 318,106.43

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Solution

The fourth proportional to 559,782.71, 772,521.14 and 318,106.43 is: 438,998.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,782.71 : 772,521.14 = 318,106.43 : x
  2. Step 2: Convert to fraction form
    559,782.71/772,521.14 = 318,106.43/x
  3. Step 3: Cross multiply
    559,782.71x = 772,521.14 × 318,106.43
  4. Step 4: Simplify right side
    559,782.71x = 245,743,940,354.40
  5. Step 5: Solve for x
    x = 245,743,940,354.40/559,782.71
  6. Step 6: Final answer
    x = 438,998.80

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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.