Home / 291,921.20-402,851.25-157,785.20

Finding the Fourth Proportional to 291,921.20, 402,851.25 and 157,785.20

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Solution

The fourth proportional to 291,921.20, 402,851.25 and 157,785.20 is: 217,743.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,921.20 : 402,851.25 = 157,785.20 : x
  2. Step 2: Convert to fraction form
    291,921.20/402,851.25 = 157,785.20/x
  3. Step 3: Cross multiply
    291,921.20x = 402,851.25 × 157,785.20
  4. Step 4: Simplify right side
    291,921.20x = 63,563,963,037.24
  5. Step 5: Solve for x
    x = 63,563,963,037.24/291,921.20
  6. Step 6: Final answer
    x = 217,743.57

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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.