Home / 678,387.36-1,017,581.04-257,662.20

Finding the Fourth Proportional to 678,387.36, 1,017,581.04 and 257,662.20

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Solution

The fourth proportional to 678,387.36, 1,017,581.04 and 257,662.20 is: 386,493.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,387.36 : 1,017,581.04 = 257,662.20 : x
  2. Step 2: Convert to fraction form
    678,387.36/1,017,581.04 = 257,662.20/x
  3. Step 3: Cross multiply
    678,387.36x = 1,017,581.04 × 257,662.20
  4. Step 4: Simplify right side
    678,387.36x = 262,192,169,444.69
  5. Step 5: Solve for x
    x = 262,192,169,444.69/678,387.36
  6. Step 6: Final answer
    x = 386,493.30

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.