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Finding the Fourth Proportional to 291,911.76, 402,838.92 and 157,775.76

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Solution

The fourth proportional to 291,911.76, 402,838.92 and 157,775.76 is: 217,730.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,911.76 : 402,838.92 = 157,775.76 : x
  2. Step 2: Convert to fraction form
    291,911.76/402,838.92 = 157,775.76/x
  3. Step 3: Cross multiply
    291,911.76x = 402,838.92 × 157,775.76
  4. Step 4: Simplify right side
    291,911.76x = 63,558,216,760.58
  5. Step 5: Solve for x
    x = 63,558,216,760.58/291,911.76
  6. Step 6: Final answer
    x = 217,730.92

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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.