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Finding the Fourth Proportional to 978,440.80, 1,466,494.80 and 409,820.80

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Solution

The fourth proportional to 978,440.80, 1,466,494.80 and 409,820.80 is: 614,242.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,440.80 : 1,466,494.80 = 409,820.80 : x
  2. Step 2: Convert to fraction form
    978,440.80/1,466,494.80 = 409,820.80/x
  3. Step 3: Cross multiply
    978,440.80x = 1,466,494.80 × 409,820.80
  4. Step 4: Simplify right side
    978,440.80x = 601,000,072,131.84
  5. Step 5: Solve for x
    x = 601,000,072,131.84/978,440.80
  6. Step 6: Final answer
    x = 614,242.65

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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.