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Finding the Fourth Proportional to 420,652.32, 580,492.32 and 239,360.16

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Solution

The fourth proportional to 420,652.32, 580,492.32 and 239,360.16 is: 330,312.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,652.32 : 580,492.32 = 239,360.16 : x
  2. Step 2: Convert to fraction form
    420,652.32/580,492.32 = 239,360.16/x
  3. Step 3: Cross multiply
    420,652.32x = 580,492.32 × 239,360.16
  4. Step 4: Simplify right side
    420,652.32x = 138,946,734,593.97
  5. Step 5: Solve for x
    x = 138,946,734,593.97/420,652.32
  6. Step 6: Final answer
    x = 330,312.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.