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Finding the Fourth Proportional to 866,510.79, 1,300,404.65 and 411,103.68

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Solution

The fourth proportional to 866,510.79, 1,300,404.65 and 411,103.68 is: 616,958.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    866,510.79 : 1,300,404.65 = 411,103.68 : x
  2. Step 2: Convert to fraction form
    866,510.79/1,300,404.65 = 411,103.68/x
  3. Step 3: Cross multiply
    866,510.79x = 1,300,404.65 × 411,103.68
  4. Step 4: Simplify right side
    866,510.79x = 534,601,135,048.59
  5. Step 5: Solve for x
    x = 534,601,135,048.59/866,510.79
  6. Step 6: Final answer
    x = 616,958.43

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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.