Home / 429,947.20-644,920.80-272,353.60

Finding the Fourth Proportional to 429,947.20, 644,920.80 and 272,353.60

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Solution

The fourth proportional to 429,947.20, 644,920.80 and 272,353.60 is: 408,530.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,947.20 : 644,920.80 = 272,353.60 : x
  2. Step 2: Convert to fraction form
    429,947.20/644,920.80 = 272,353.60/x
  3. Step 3: Cross multiply
    429,947.20x = 644,920.80 × 272,353.60
  4. Step 4: Simplify right side
    429,947.20x = 175,646,501,594.88
  5. Step 5: Solve for x
    x = 175,646,501,594.88/429,947.20
  6. Step 6: Final answer
    x = 408,530.40

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1.5x scale

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.