Home / 498,389.25-687,702.78-280,566.48

Finding the Fourth Proportional to 498,389.25, 687,702.78 and 280,566.48

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Solution

The fourth proportional to 498,389.25, 687,702.78 and 280,566.48 is: 387,139.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,389.25 : 687,702.78 = 280,566.48 : x
  2. Step 2: Convert to fraction form
    498,389.25/687,702.78 = 280,566.48/x
  3. Step 3: Cross multiply
    498,389.25x = 687,702.78 × 280,566.48
  4. Step 4: Simplify right side
    498,389.25x = 192,946,348,270.81
  5. Step 5: Solve for x
    x = 192,946,348,270.81/498,389.25
  6. Step 6: Final answer
    x = 387,139.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.