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Finding the Fourth Proportional to 210,904.62, 291,041.31 and 115,404.90

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Solution

The fourth proportional to 210,904.62, 291,041.31 and 115,404.90 is: 159,254.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,904.62 : 291,041.31 = 115,404.90 : x
  2. Step 2: Convert to fraction form
    210,904.62/291,041.31 = 115,404.90/x
  3. Step 3: Cross multiply
    210,904.62x = 291,041.31 × 115,404.90
  4. Step 4: Simplify right side
    210,904.62x = 33,587,593,276.42
  5. Step 5: Solve for x
    x = 33,587,593,276.42/210,904.62
  6. Step 6: Final answer
    x = 159,254.90

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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.