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Finding the Fourth Proportional to 291,818.09, 402,861.17 and 207,137.45

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Solution

The fourth proportional to 291,818.09, 402,861.17 and 207,137.45 is: 285,957.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,818.09 : 402,861.17 = 207,137.45 : x
  2. Step 2: Convert to fraction form
    291,818.09/402,861.17 = 207,137.45/x
  3. Step 3: Cross multiply
    291,818.09x = 402,861.17 × 207,137.45
  4. Step 4: Simplify right side
    291,818.09x = 83,447,633,961.35
  5. Step 5: Solve for x
    x = 83,447,633,961.35/291,818.09
  6. Step 6: Final answer
    x = 285,957.72

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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.