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Finding the Fourth Proportional to 880,640.70, 1,321,479.45 and 319,602.30

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Solution

The fourth proportional to 880,640.70, 1,321,479.45 and 319,602.30 is: 479,591.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    880,640.70 : 1,321,479.45 = 319,602.30 : x
  2. Step 2: Convert to fraction form
    880,640.70/1,321,479.45 = 319,602.30/x
  3. Step 3: Cross multiply
    880,640.70x = 1,321,479.45 × 319,602.30
  4. Step 4: Simplify right side
    880,640.70x = 422,347,871,622.74
  5. Step 5: Solve for x
    x = 422,347,871,622.74/880,640.70
  6. Step 6: Final answer
    x = 479,591.59

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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.