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Finding the Fourth Proportional to 879,417.20, 1,314,978.60 and 655,468.40

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Solution

The fourth proportional to 879,417.20, 1,314,978.60 and 655,468.40 is: 980,111.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,417.20 : 1,314,978.60 = 655,468.40 : x
  2. Step 2: Convert to fraction form
    879,417.20/1,314,978.60 = 655,468.40/x
  3. Step 3: Cross multiply
    879,417.20x = 1,314,978.60 × 655,468.40
  4. Step 4: Simplify right side
    879,417.20x = 861,926,918,976.24
  5. Step 5: Solve for x
    x = 861,926,918,976.24/879,417.20
  6. Step 6: Final answer
    x = 980,111.51

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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.