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Finding the Fourth Proportional to 291,855.87, 402,731.58 and 215,416.71

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Solution

The fourth proportional to 291,855.87, 402,731.58 and 215,416.71 is: 297,253.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,855.87 : 402,731.58 = 215,416.71 : x
  2. Step 2: Convert to fraction form
    291,855.87/402,731.58 = 215,416.71/x
  3. Step 3: Cross multiply
    291,855.87x = 402,731.58 × 215,416.71
  4. Step 4: Simplify right side
    291,855.87x = 86,755,111,976.70
  5. Step 5: Solve for x
    x = 86,755,111,976.70/291,855.87
  6. Step 6: Final answer
    x = 297,253.27

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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.