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Finding the Fourth Proportional to 1,292,609.20, 1,938,913.80 and 732,737.20

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Solution

The fourth proportional to 1,292,609.20, 1,938,913.80 and 732,737.20 is: 1,099,105.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292,609.20 : 1,938,913.80 = 732,737.20 : x
  2. Step 2: Convert to fraction form
    1,292,609.20/1,938,913.80 = 732,737.20/x
  3. Step 3: Cross multiply
    1,292,609.20x = 1,938,913.80 × 732,737.20
  4. Step 4: Simplify right side
    1,292,609.20x = 1,420,714,268,853.36
  5. Step 5: Solve for x
    x = 1,420,714,268,853.36/1,292,609.20
  6. Step 6: Final answer
    x = 1,099,105.80

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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.