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Finding the Fourth Proportional to 387,105.76, 534,192.18 and 217,347.04

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Solution

The fourth proportional to 387,105.76, 534,192.18 and 217,347.04 is: 299,931.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,105.76 : 534,192.18 = 217,347.04 : x
  2. Step 2: Convert to fraction form
    387,105.76/534,192.18 = 217,347.04/x
  3. Step 3: Cross multiply
    387,105.76x = 534,192.18 × 217,347.04
  4. Step 4: Simplify right side
    387,105.76x = 116,105,089,114.15
  5. Step 5: Solve for x
    x = 116,105,089,114.15/387,105.76
  6. Step 6: Final answer
    x = 299,931.18

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1.5x scale

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.