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Finding the Fourth Proportional to 420,627.20, 630,710.40 and 171,027.20

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Solution

The fourth proportional to 420,627.20, 630,710.40 and 171,027.20 is: 256,447.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,627.20 : 630,710.40 = 171,027.20 : x
  2. Step 2: Convert to fraction form
    420,627.20/630,710.40 = 171,027.20/x
  3. Step 3: Cross multiply
    420,627.20x = 630,710.40 × 171,027.20
  4. Step 4: Simplify right side
    420,627.20x = 107,868,633,722.88
  5. Step 5: Solve for x
    x = 107,868,633,722.88/420,627.20
  6. Step 6: Final answer
    x = 256,447.12

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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.