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Finding the Fourth Proportional to 420,217.56, 630,241.56 and 153,887.16

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Solution

The fourth proportional to 420,217.56, 630,241.56 and 153,887.16 is: 230,799.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,217.56 : 630,241.56 = 153,887.16 : x
  2. Step 2: Convert to fraction form
    420,217.56/630,241.56 = 153,887.16/x
  3. Step 3: Cross multiply
    420,217.56x = 630,241.56 × 153,887.16
  4. Step 4: Simplify right side
    420,217.56x = 96,986,083,782.37
  5. Step 5: Solve for x
    x = 96,986,083,782.37/420,217.56
  6. Step 6: Final answer
    x = 230,799.69

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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.