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Finding the Fourth Proportional to 572,761.13, 790,426.76 and 318,128.72

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Solution

The fourth proportional to 572,761.13, 790,426.76 and 318,128.72 is: 439,026.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,761.13 : 790,426.76 = 318,128.72 : x
  2. Step 2: Convert to fraction form
    572,761.13/790,426.76 = 318,128.72/x
  3. Step 3: Cross multiply
    572,761.13x = 790,426.76 × 318,128.72
  4. Step 4: Simplify right side
    572,761.13x = 251,457,447,869.77
  5. Step 5: Solve for x
    x = 251,457,447,869.77/572,761.13
  6. Step 6: Final answer
    x = 439,026.74

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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.