Home / 678,388.36-1,017,582.54-257,663.20

Finding the Fourth Proportional to 678,388.36, 1,017,582.54 and 257,663.20

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Solution

The fourth proportional to 678,388.36, 1,017,582.54 and 257,663.20 is: 386,494.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,388.36 : 1,017,582.54 = 257,663.20 : x
  2. Step 2: Convert to fraction form
    678,388.36/1,017,582.54 = 257,663.20/x
  3. Step 3: Cross multiply
    678,388.36x = 1,017,582.54 × 257,663.20
  4. Step 4: Simplify right side
    678,388.36x = 262,193,573,520.53
  5. Step 5: Solve for x
    x = 262,193,573,520.53/678,388.36
  6. Step 6: Final answer
    x = 386,494.80

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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.