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Finding the Fourth Proportional to 420,154.24, 579,861.86 and 238,893.32

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Solution

The fourth proportional to 420,154.24, 579,861.86 and 238,893.32 is: 329,700.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,154.24 : 579,861.86 = 238,893.32 : x
  2. Step 2: Convert to fraction form
    420,154.24/579,861.86 = 238,893.32/x
  3. Step 3: Cross multiply
    420,154.24x = 579,861.86 × 238,893.32
  4. Step 4: Simplify right side
    420,154.24x = 138,525,124,876.78
  5. Step 5: Solve for x
    x = 138,525,124,876.78/420,154.24
  6. Step 6: Final answer
    x = 329,700.65

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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.