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Finding the Fourth Proportional to 386,312, 533,112.48 and 225,278.72

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Solution

The fourth proportional to 386,312, 533,112.48 and 225,278.72 is: 310,885.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,312 : 533,112.48 = 225,278.72 : x
  2. Step 2: Convert to fraction form
    386,312/533,112.48 = 225,278.72/x
  3. Step 3: Cross multiply
    386,312x = 533,112.48 × 225,278.72
  4. Step 4: Simplify right side
    386,312x = 120,098,897,110.43
  5. Step 5: Solve for x
    x = 120,098,897,110.43/386,312
  6. Step 6: Final answer
    x = 310,885.75

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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.