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Finding the Fourth Proportional to 478,876.80, 718,315.20 and 438,441.60

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Solution

The fourth proportional to 478,876.80, 718,315.20 and 438,441.60 is: 657,662.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,876.80 : 718,315.20 = 438,441.60 : x
  2. Step 2: Convert to fraction form
    478,876.80/718,315.20 = 438,441.60/x
  3. Step 3: Cross multiply
    478,876.80x = 718,315.20 × 438,441.60
  4. Step 4: Simplify right side
    478,876.80x = 314,939,265,592.32
  5. Step 5: Solve for x
    x = 314,939,265,592.32/478,876.80
  6. Step 6: Final answer
    x = 657,662.40

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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.