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Finding the Fourth Proportional to 873,671.28, 1,205,705.16 and 491,722.80

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Solution

The fourth proportional to 873,671.28, 1,205,705.16 and 491,722.80 is: 678,599.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    873,671.28 : 1,205,705.16 = 491,722.80 : x
  2. Step 2: Convert to fraction form
    873,671.28/1,205,705.16 = 491,722.80/x
  3. Step 3: Cross multiply
    873,671.28x = 1,205,705.16 × 491,722.80
  4. Step 4: Simplify right side
    873,671.28x = 592,872,717,249.65
  5. Step 5: Solve for x
    x = 592,872,717,249.65/873,671.28
  6. Step 6: Final answer
    x = 678,599.30

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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.