Home / 919,319.40-1,378,979.10-288,232.20

Finding the Fourth Proportional to 919,319.40, 1,378,979.10 and 288,232.20

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Solution

The fourth proportional to 919,319.40, 1,378,979.10 and 288,232.20 is: 432,348.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,319.40 : 1,378,979.10 = 288,232.20 : x
  2. Step 2: Convert to fraction form
    919,319.40/1,378,979.10 = 288,232.20/x
  3. Step 3: Cross multiply
    919,319.40x = 1,378,979.10 × 288,232.20
  4. Step 4: Simplify right side
    919,319.40x = 397,466,179,747.02
  5. Step 5: Solve for x
    x = 397,466,179,747.02/919,319.40
  6. Step 6: Final answer
    x = 432,348.30

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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.