Home / 485,320.80-727,981.20-433,999.20

Finding the Fourth Proportional to 485,320.80, 727,981.20 and 433,999.20

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Solution

The fourth proportional to 485,320.80, 727,981.20 and 433,999.20 is: 650,998.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,320.80 : 727,981.20 = 433,999.20 : x
  2. Step 2: Convert to fraction form
    485,320.80/727,981.20 = 433,999.20/x
  3. Step 3: Cross multiply
    485,320.80x = 727,981.20 × 433,999.20
  4. Step 4: Simplify right side
    485,320.80x = 315,943,258,415.04
  5. Step 5: Solve for x
    x = 315,943,258,415.04/485,320.80
  6. Step 6: Final answer
    x = 650,998.80

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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.