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Finding the Fourth Proportional to 474,817.20, 712,225.80 and 142,393.20

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Solution

The fourth proportional to 474,817.20, 712,225.80 and 142,393.20 is: 213,589.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    474,817.20 : 712,225.80 = 142,393.20 : x
  2. Step 2: Convert to fraction form
    474,817.20/712,225.80 = 142,393.20/x
  3. Step 3: Cross multiply
    474,817.20x = 712,225.80 × 142,393.20
  4. Step 4: Simplify right side
    474,817.20x = 101,416,110,784.56
  5. Step 5: Solve for x
    x = 101,416,110,784.56/474,817.20
  6. Step 6: Final answer
    x = 213,589.80

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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.