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Finding the Fourth Proportional to 296,679.84, 445,114.80 and 86,330.40

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Solution

The fourth proportional to 296,679.84, 445,114.80 and 86,330.40 is: 129,523.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    296,679.84 : 445,114.80 = 86,330.40 : x
  2. Step 2: Convert to fraction form
    296,679.84/445,114.80 = 86,330.40/x
  3. Step 3: Cross multiply
    296,679.84x = 445,114.80 × 86,330.40
  4. Step 4: Simplify right side
    296,679.84x = 38,426,938,729.92
  5. Step 5: Solve for x
    x = 38,426,938,729.92/296,679.84
  6. Step 6: Final answer
    x = 129,523.26

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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.