Home / 747,986.40-1,121,979.60-432,280.80

Finding the Fourth Proportional to 747,986.40, 1,121,979.60 and 432,280.80

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Solution

The fourth proportional to 747,986.40, 1,121,979.60 and 432,280.80 is: 648,421.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    747,986.40 : 1,121,979.60 = 432,280.80 : x
  2. Step 2: Convert to fraction form
    747,986.40/1,121,979.60 = 432,280.80/x
  3. Step 3: Cross multiply
    747,986.40x = 1,121,979.60 × 432,280.80
  4. Step 4: Simplify right side
    747,986.40x = 485,010,239,071.68
  5. Step 5: Solve for x
    x = 485,010,239,071.68/747,986.40
  6. Step 6: Final answer
    x = 648,421.20

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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.