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Finding the Fourth Proportional to 443,543.13, 612,360.77 and 288,642.02

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Solution

The fourth proportional to 443,543.13, 612,360.77 and 288,642.02 is: 398,502.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,543.13 : 612,360.77 = 288,642.02 : x
  2. Step 2: Convert to fraction form
    443,543.13/612,360.77 = 288,642.02/x
  3. Step 3: Cross multiply
    443,543.13x = 612,360.77 × 288,642.02
  4. Step 4: Simplify right side
    443,543.13x = 176,753,045,116.54
  5. Step 5: Solve for x
    x = 176,753,045,116.54/443,543.13
  6. Step 6: Final answer
    x = 398,502.50

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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.