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Finding the Fourth Proportional to 292,364.70, 438,719.85 and 213,279.90

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Solution

The fourth proportional to 292,364.70, 438,719.85 and 213,279.90 is: 320,045.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,364.70 : 438,719.85 = 213,279.90 : x
  2. Step 2: Convert to fraction form
    292,364.70/438,719.85 = 213,279.90/x
  3. Step 3: Cross multiply
    292,364.70x = 438,719.85 × 213,279.90
  4. Step 4: Simplify right side
    292,364.70x = 93,570,125,736.02
  5. Step 5: Solve for x
    x = 93,570,125,736.02/292,364.70
  6. Step 6: Final answer
    x = 320,045.91

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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.