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Finding the Fourth Proportional to 572,520.84, 790,103.42 and 317,872

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Solution

The fourth proportional to 572,520.84, 790,103.42 and 317,872 is: 438,677.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,520.84 : 790,103.42 = 317,872 : x
  2. Step 2: Convert to fraction form
    572,520.84/790,103.42 = 317,872/x
  3. Step 3: Cross multiply
    572,520.84x = 790,103.42 × 317,872
  4. Step 4: Simplify right side
    572,520.84x = 251,151,754,322.24
  5. Step 5: Solve for x
    x = 251,151,754,322.24/572,520.84
  6. Step 6: Final answer
    x = 438,677.05

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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.