Home / 578,647.20-867,970.80-485,335.20

Finding the Fourth Proportional to 578,647.20, 867,970.80 and 485,335.20

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Solution

The fourth proportional to 578,647.20, 867,970.80 and 485,335.20 is: 728,002.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,647.20 : 867,970.80 = 485,335.20 : x
  2. Step 2: Convert to fraction form
    578,647.20/867,970.80 = 485,335.20/x
  3. Step 3: Cross multiply
    578,647.20x = 867,970.80 × 485,335.20
  4. Step 4: Simplify right side
    578,647.20x = 421,256,781,812.16
  5. Step 5: Solve for x
    x = 421,256,781,812.16/578,647.20
  6. Step 6: Final answer
    x = 728,002.80

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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.