Home / 843,142.40-1,264,276.20-310,389.20

Finding the Fourth Proportional to 843,142.40, 1,264,276.20 and 310,389.20

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Solution

The fourth proportional to 843,142.40, 1,264,276.20 and 310,389.20 is: 465,422.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    843,142.40 : 1,264,276.20 = 310,389.20 : x
  2. Step 2: Convert to fraction form
    843,142.40/1,264,276.20 = 310,389.20/x
  3. Step 3: Cross multiply
    843,142.40x = 1,264,276.20 × 310,389.20
  4. Step 4: Simplify right side
    843,142.40x = 392,417,678,297.04
  5. Step 5: Solve for x
    x = 392,417,678,297.04/843,142.40
  6. Step 6: Final answer
    x = 465,422.78

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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.