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Finding the Fourth Proportional to 880,468.80, 1,320,703.20 and 319,430.40

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Solution

The fourth proportional to 880,468.80, 1,320,703.20 and 319,430.40 is: 479,145.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    880,468.80 : 1,320,703.20 = 319,430.40 : x
  2. Step 2: Convert to fraction form
    880,468.80/1,320,703.20 = 319,430.40/x
  3. Step 3: Cross multiply
    880,468.80x = 1,320,703.20 × 319,430.40
  4. Step 4: Simplify right side
    880,468.80x = 421,872,751,457.28
  5. Step 5: Solve for x
    x = 421,872,751,457.28/880,468.80
  6. Step 6: Final answer
    x = 479,145.60

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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.