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Finding the Fourth Proportional to 659,328.40, 988,992.60 and 615,091.60

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Solution

The fourth proportional to 659,328.40, 988,992.60 and 615,091.60 is: 922,637.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,328.40 : 988,992.60 = 615,091.60 : x
  2. Step 2: Convert to fraction form
    659,328.40/988,992.60 = 615,091.60/x
  3. Step 3: Cross multiply
    659,328.40x = 988,992.60 × 615,091.60
  4. Step 4: Simplify right side
    659,328.40x = 608,321,040,722.16
  5. Step 5: Solve for x
    x = 608,321,040,722.16/659,328.40
  6. Step 6: Final answer
    x = 922,637.40

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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.