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Finding the Fourth Proportional to 387,445.58, 534,672.87 and 217,678.22

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Solution

The fourth proportional to 387,445.58, 534,672.87 and 217,678.22 is: 300,394.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,445.58 : 534,672.87 = 217,678.22 : x
  2. Step 2: Convert to fraction form
    387,445.58/534,672.87 = 217,678.22/x
  3. Step 3: Cross multiply
    387,445.58x = 534,672.87 × 217,678.22
  4. Step 4: Simplify right side
    387,445.58x = 116,386,638,623.89
  5. Step 5: Solve for x
    x = 116,386,638,623.89/387,445.58
  6. Step 6: Final answer
    x = 300,394.80

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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.