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Finding the Fourth Proportional to 292,480.80, 438,721.20 and 217,831.20

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Solution

The fourth proportional to 292,480.80, 438,721.20 and 217,831.20 is: 326,746.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,480.80 : 438,721.20 = 217,831.20 : x
  2. Step 2: Convert to fraction form
    292,480.80/438,721.20 = 217,831.20/x
  3. Step 3: Cross multiply
    292,480.80x = 438,721.20 × 217,831.20
  4. Step 4: Simplify right side
    292,480.80x = 95,567,165,461.44
  5. Step 5: Solve for x
    x = 95,567,165,461.44/292,480.80
  6. Step 6: Final answer
    x = 326,746.80

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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.