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Finding the Fourth Proportional to 292,279.70, 438,419.55 and 81,890.30

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Solution

The fourth proportional to 292,279.70, 438,419.55 and 81,890.30 is: 122,835.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,279.70 : 438,419.55 = 81,890.30 : x
  2. Step 2: Convert to fraction form
    292,279.70/438,419.55 = 81,890.30/x
  3. Step 3: Cross multiply
    292,279.70x = 438,419.55 × 81,890.30
  4. Step 4: Simplify right side
    292,279.70x = 35,902,308,475.37
  5. Step 5: Solve for x
    x = 35,902,308,475.37/292,279.70
  6. Step 6: Final answer
    x = 122,835.45

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Similar ratio
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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.