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Finding the Fourth Proportional to 978,381.60, 1,467,718.20 and 347,242.56

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Solution

The fourth proportional to 978,381.60, 1,467,718.20 and 347,242.56 is: 520,915.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,381.60 : 1,467,718.20 = 347,242.56 : x
  2. Step 2: Convert to fraction form
    978,381.60/1,467,718.20 = 347,242.56/x
  3. Step 3: Cross multiply
    978,381.60x = 1,467,718.20 × 347,242.56
  4. Step 4: Simplify right side
    978,381.60x = 509,654,225,126.59
  5. Step 5: Solve for x
    x = 509,654,225,126.59/978,381.60
  6. Step 6: Final answer
    x = 520,915.59

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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.