Home / 578,046.30-867,069.45-438,078.30

Finding the Fourth Proportional to 578,046.30, 867,069.45 and 438,078.30

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Solution

The fourth proportional to 578,046.30, 867,069.45 and 438,078.30 is: 657,117.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,046.30 : 867,069.45 = 438,078.30 : x
  2. Step 2: Convert to fraction form
    578,046.30/867,069.45 = 438,078.30/x
  3. Step 3: Cross multiply
    578,046.30x = 867,069.45 × 438,078.30
  4. Step 4: Simplify right side
    578,046.30x = 379,844,310,637.94
  5. Step 5: Solve for x
    x = 379,844,310,637.94/578,046.30
  6. Step 6: Final answer
    x = 657,117.45

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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.