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Finding the Fourth Proportional to 289,238.64, 399,158.52 and 168,422.28

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Solution

The fourth proportional to 289,238.64, 399,158.52 and 168,422.28 is: 232,428.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,238.64 : 399,158.52 = 168,422.28 : x
  2. Step 2: Convert to fraction form
    289,238.64/399,158.52 = 168,422.28/x
  3. Step 3: Cross multiply
    289,238.64x = 399,158.52 × 168,422.28
  4. Step 4: Simplify right side
    289,238.64x = 67,227,188,019.83
  5. Step 5: Solve for x
    x = 67,227,188,019.83/289,238.64
  6. Step 6: Final answer
    x = 232,428.10

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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.