Home / 429,280.80-643,921.20-148,826.40

Finding the Fourth Proportional to 429,280.80, 643,921.20 and 148,826.40

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Solution

The fourth proportional to 429,280.80, 643,921.20 and 148,826.40 is: 223,239.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,280.80 : 643,921.20 = 148,826.40 : x
  2. Step 2: Convert to fraction form
    429,280.80/643,921.20 = 148,826.40/x
  3. Step 3: Cross multiply
    429,280.80x = 643,921.20 × 148,826.40
  4. Step 4: Simplify right side
    429,280.80x = 95,832,474,079.68
  5. Step 5: Solve for x
    x = 95,832,474,079.68/429,280.80
  6. Step 6: Final answer
    x = 223,239.60

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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.