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Finding the Fourth Proportional to 420,599.67, 580,407.30 and 239,294.67

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Solution

The fourth proportional to 420,599.67, 580,407.30 and 239,294.67 is: 330,215.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,599.67 : 580,407.30 = 239,294.67 : x
  2. Step 2: Convert to fraction form
    420,599.67/580,407.30 = 239,294.67/x
  3. Step 3: Cross multiply
    420,599.67x = 580,407.30 × 239,294.67
  4. Step 4: Simplify right side
    420,599.67x = 138,888,373,319.09
  5. Step 5: Solve for x
    x = 138,888,373,319.09/420,599.67
  6. Step 6: Final answer
    x = 330,215.13

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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.