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Finding the Fourth Proportional to 420,171.28, 630,256.60 and 124,683.28

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Solution

The fourth proportional to 420,171.28, 630,256.60 and 124,683.28 is: 187,024.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,171.28 : 630,256.60 = 124,683.28 : x
  2. Step 2: Convert to fraction form
    420,171.28/630,256.60 = 124,683.28/x
  3. Step 3: Cross multiply
    420,171.28x = 630,256.60 × 124,683.28
  4. Step 4: Simplify right side
    420,171.28x = 78,582,460,129.65
  5. Step 5: Solve for x
    x = 78,582,460,129.65/420,171.28
  6. Step 6: Final answer
    x = 187,024.83

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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.