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Finding the Fourth Proportional to 572,767.80, 790,397.76 and 318,135.36

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Solution

The fourth proportional to 572,767.80, 790,397.76 and 318,135.36 is: 439,014.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,767.80 : 790,397.76 = 318,135.36 : x
  2. Step 2: Convert to fraction form
    572,767.80/790,397.76 = 318,135.36/x
  3. Step 3: Cross multiply
    572,767.80x = 790,397.76 × 318,135.36
  4. Step 4: Simplify right side
    572,767.80x = 251,453,475,920.79
  5. Step 5: Solve for x
    x = 251,453,475,920.79/572,767.80
  6. Step 6: Final answer
    x = 439,014.69

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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.