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Finding the Fourth Proportional to 478,852.80, 718,279.20 and 212,330.40

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Solution

The fourth proportional to 478,852.80, 718,279.20 and 212,330.40 is: 318,495.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,852.80 : 718,279.20 = 212,330.40 : x
  2. Step 2: Convert to fraction form
    478,852.80/718,279.20 = 212,330.40/x
  3. Step 3: Cross multiply
    478,852.80x = 718,279.20 × 212,330.40
  4. Step 4: Simplify right side
    478,852.80x = 152,512,509,847.68
  5. Step 5: Solve for x
    x = 152,512,509,847.68/478,852.80
  6. Step 6: Final answer
    x = 318,495.60

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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.