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Finding the Fourth Proportional to 572,839.70, 790,543.80 and 318,190.88

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Solution

The fourth proportional to 572,839.70, 790,543.80 and 318,190.88 is: 439,117.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,839.70 : 790,543.80 = 318,190.88 : x
  2. Step 2: Convert to fraction form
    572,839.70/790,543.80 = 318,190.88/x
  3. Step 3: Cross multiply
    572,839.70x = 790,543.80 × 318,190.88
  4. Step 4: Simplify right side
    572,839.70x = 251,543,829,376.90
  5. Step 5: Solve for x
    x = 251,543,829,376.90/572,839.70
  6. Step 6: Final answer
    x = 439,117.32

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1.5x scale

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.