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Finding the Fourth Proportional to 572,505.64, 790,026.92 and 317,840.42

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Solution

The fourth proportional to 572,505.64, 790,026.92 and 317,840.42 is: 438,602.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,505.64 : 790,026.92 = 317,840.42 : x
  2. Step 2: Convert to fraction form
    572,505.64/790,026.92 = 317,840.42/x
  3. Step 3: Cross multiply
    572,505.64x = 790,026.92 × 317,840.42
  4. Step 4: Simplify right side
    572,505.64x = 251,102,489,641.87
  5. Step 5: Solve for x
    x = 251,102,489,641.87/572,505.64
  6. Step 6: Final answer
    x = 438,602.65

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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.