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Finding the Fourth Proportional to 478,676.70, 718,015.05 and 455,348.70

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Solution

The fourth proportional to 478,676.70, 718,015.05 and 455,348.70 is: 683,023.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,676.70 : 718,015.05 = 455,348.70 : x
  2. Step 2: Convert to fraction form
    478,676.70/718,015.05 = 455,348.70/x
  3. Step 3: Cross multiply
    478,676.70x = 718,015.05 × 455,348.70
  4. Step 4: Simplify right side
    478,676.70x = 326,947,219,597.94
  5. Step 5: Solve for x
    x = 326,947,219,597.94/478,676.70
  6. Step 6: Final answer
    x = 683,023.05

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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.