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Finding the Fourth Proportional to 420,147.72, 630,250.29 and 120,605.26

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Solution

The fourth proportional to 420,147.72, 630,250.29 and 120,605.26 is: 180,916.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,147.72 : 630,250.29 = 120,605.26 : x
  2. Step 2: Convert to fraction form
    420,147.72/630,250.29 = 120,605.26/x
  3. Step 3: Cross multiply
    420,147.72x = 630,250.29 × 120,605.26
  4. Step 4: Simplify right side
    420,147.72x = 76,011,500,090.53
  5. Step 5: Solve for x
    x = 76,011,500,090.53/420,147.72
  6. Step 6: Final answer
    x = 180,916.13

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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.