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Finding the Fourth Proportional to 639,886.30, 883,037.91 and 353,426.02

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Solution

The fourth proportional to 639,886.30, 883,037.91 and 353,426.02 is: 487,725.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,886.30 : 883,037.91 = 353,426.02 : x
  2. Step 2: Convert to fraction form
    639,886.30/883,037.91 = 353,426.02/x
  3. Step 3: Cross multiply
    639,886.30x = 883,037.91 × 353,426.02
  4. Step 4: Simplify right side
    639,886.30x = 312,088,574,040.42
  5. Step 5: Solve for x
    x = 312,088,574,040.42/639,886.30
  6. Step 6: Final answer
    x = 487,725.04

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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.