Home / 728,436.40-1,091,488.20-478,826.80

Finding the Fourth Proportional to 728,436.40, 1,091,488.20 and 478,826.80

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Solution

The fourth proportional to 728,436.40, 1,091,488.20 and 478,826.80 is: 717,473.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,436.40 : 1,091,488.20 = 478,826.80 : x
  2. Step 2: Convert to fraction form
    728,436.40/1,091,488.20 = 478,826.80/x
  3. Step 3: Cross multiply
    728,436.40x = 1,091,488.20 × 478,826.80
  4. Step 4: Simplify right side
    728,436.40x = 522,633,802,043.76
  5. Step 5: Solve for x
    x = 522,633,802,043.76/728,436.40
  6. Step 6: Final answer
    x = 717,473.48

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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.