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Finding the Fourth Proportional to 291,656.64, 402,485.92 and 157,520.64

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Solution

The fourth proportional to 291,656.64, 402,485.92 and 157,520.64 is: 217,378.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,656.64 : 402,485.92 = 157,520.64 : x
  2. Step 2: Convert to fraction form
    291,656.64/402,485.92 = 157,520.64/x
  3. Step 3: Cross multiply
    291,656.64x = 402,485.92 × 157,520.64
  4. Step 4: Simplify right side
    291,656.64x = 63,399,839,709.39
  5. Step 5: Solve for x
    x = 63,399,839,709.39/291,656.64
  6. Step 6: Final answer
    x = 217,378.35

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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.