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Finding the Fourth Proportional to 289,672.32, 399,746.88 and 168,885.12

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Solution

The fourth proportional to 289,672.32, 399,746.88 and 168,885.12 is: 233,060.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,672.32 : 399,746.88 = 168,885.12 : x
  2. Step 2: Convert to fraction form
    289,672.32/399,746.88 = 168,885.12/x
  3. Step 3: Cross multiply
    289,672.32x = 399,746.88 × 168,885.12
  4. Step 4: Simplify right side
    289,672.32x = 67,511,299,798.43
  5. Step 5: Solve for x
    x = 67,511,299,798.43/289,672.32
  6. Step 6: Final answer
    x = 233,060.93

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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.