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Finding the Fourth Proportional to 1,292,174.72, 1,938,659.04 and 661,531.20

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Solution

The fourth proportional to 1,292,174.72, 1,938,659.04 and 661,531.20 is: 992,500.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,292,174.72 : 1,938,659.04 = 661,531.20 : x
  2. Step 2: Convert to fraction form
    1,292,174.72/1,938,659.04 = 661,531.20/x
  3. Step 3: Cross multiply
    1,292,174.72x = 1,938,659.04 × 661,531.20
  4. Step 4: Simplify right side
    1,292,174.72x = 1,282,483,441,122.05
  5. Step 5: Solve for x
    x = 1,282,483,441,122.05/1,292,174.72
  6. Step 6: Final answer
    x = 992,500.02

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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.