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Finding the Fourth Proportional to 880,927.20, 1,321,909.20 and 320,018.40

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Solution

The fourth proportional to 880,927.20, 1,321,909.20 and 320,018.40 is: 480,215.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    880,927.20 : 1,321,909.20 = 320,018.40 : x
  2. Step 2: Convert to fraction form
    880,927.20/1,321,909.20 = 320,018.40/x
  3. Step 3: Cross multiply
    880,927.20x = 1,321,909.20 × 320,018.40
  4. Step 4: Simplify right side
    880,927.20x = 423,035,267,129.28
  5. Step 5: Solve for x
    x = 423,035,267,129.28/880,927.20
  6. Step 6: Final answer
    x = 480,215.92

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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.