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Finding the Fourth Proportional to 402,679.20, 604,364.40 and 178,384.80

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Solution

The fourth proportional to 402,679.20, 604,364.40 and 178,384.80 is: 267,730.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,679.20 : 604,364.40 = 178,384.80 : x
  2. Step 2: Convert to fraction form
    402,679.20/604,364.40 = 178,384.80/x
  3. Step 3: Cross multiply
    402,679.20x = 604,364.40 × 178,384.80
  4. Step 4: Simplify right side
    402,679.20x = 107,809,422,621.12
  5. Step 5: Solve for x
    x = 107,809,422,621.12/402,679.20
  6. Step 6: Final answer
    x = 267,730.30

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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.