Home / 728,439.40-1,091,492.70-478,829.80

Finding the Fourth Proportional to 728,439.40, 1,091,492.70 and 478,829.80

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Solution

The fourth proportional to 728,439.40, 1,091,492.70 and 478,829.80 is: 717,477.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,439.40 : 1,091,492.70 = 478,829.80 : x
  2. Step 2: Convert to fraction form
    728,439.40/1,091,492.70 = 478,829.80/x
  3. Step 3: Cross multiply
    728,439.40x = 1,091,492.70 × 478,829.80
  4. Step 4: Simplify right side
    728,439.40x = 522,639,231,242.46
  5. Step 5: Solve for x
    x = 522,639,231,242.46/728,439.40
  6. Step 6: Final answer
    x = 717,477.98

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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.