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Finding the Fourth Proportional to 861,729.68, 1,292,011.32 and 300,458

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Solution

The fourth proportional to 861,729.68, 1,292,011.32 and 300,458 is: 450,483.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,729.68 : 1,292,011.32 = 300,458 : x
  2. Step 2: Convert to fraction form
    861,729.68/1,292,011.32 = 300,458/x
  3. Step 3: Cross multiply
    861,729.68x = 1,292,011.32 × 300,458
  4. Step 4: Simplify right side
    861,729.68x = 388,195,137,184.56
  5. Step 5: Solve for x
    x = 388,195,137,184.56/861,729.68
  6. Step 6: Final answer
    x = 450,483.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.