Home / 728,437.40-1,091,489.70-478,827.80

Finding the Fourth Proportional to 728,437.40, 1,091,489.70 and 478,827.80

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Solution

The fourth proportional to 728,437.40, 1,091,489.70 and 478,827.80 is: 717,474.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,437.40 : 1,091,489.70 = 478,827.80 : x
  2. Step 2: Convert to fraction form
    728,437.40/1,091,489.70 = 478,827.80/x
  3. Step 3: Cross multiply
    728,437.40x = 1,091,489.70 × 478,827.80
  4. Step 4: Simplify right side
    728,437.40x = 522,635,611,773.66
  5. Step 5: Solve for x
    x = 522,635,611,773.66/728,437.40
  6. Step 6: Final answer
    x = 717,474.98

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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.