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Finding the Fourth Proportional to 660,138.40, 987,097.20 and 492,176.80

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Solution

The fourth proportional to 660,138.40, 987,097.20 and 492,176.80 is: 735,946.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,138.40 : 987,097.20 = 492,176.80 : x
  2. Step 2: Convert to fraction form
    660,138.40/987,097.20 = 492,176.80/x
  3. Step 3: Cross multiply
    660,138.40x = 987,097.20 × 492,176.80
  4. Step 4: Simplify right side
    660,138.40x = 485,826,341,184.96
  5. Step 5: Solve for x
    x = 485,826,341,184.96/660,138.40
  6. Step 6: Final answer
    x = 735,946.19

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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.