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Finding the Fourth Proportional to 330,307.20, 495,655.20 and 119,966.40

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Solution

The fourth proportional to 330,307.20, 495,655.20 and 119,966.40 is: 180,020.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,307.20 : 495,655.20 = 119,966.40 : x
  2. Step 2: Convert to fraction form
    330,307.20/495,655.20 = 119,966.40/x
  3. Step 3: Cross multiply
    330,307.20x = 495,655.20 × 119,966.40
  4. Step 4: Simplify right side
    330,307.20x = 59,461,969,985.28
  5. Step 5: Solve for x
    x = 59,461,969,985.28/330,307.20
  6. Step 6: Final answer
    x = 180,020.21

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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.