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Finding the Fourth Proportional to 572,689.71, 790,290.15 and 318,057.30

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Solution

The fourth proportional to 572,689.71, 790,290.15 and 318,057.30 is: 438,907.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,689.71 : 790,290.15 = 318,057.30 : x
  2. Step 2: Convert to fraction form
    572,689.71/790,290.15 = 318,057.30/x
  3. Step 3: Cross multiply
    572,689.71x = 790,290.15 × 318,057.30
  4. Step 4: Simplify right side
    572,689.71x = 251,357,549,735.31
  5. Step 5: Solve for x
    x = 251,357,549,735.31/572,689.71
  6. Step 6: Final answer
    x = 438,907.05

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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.