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Finding the Fourth Proportional to 478,418.80, 717,628.20 and 346,542.70

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Solution

The fourth proportional to 478,418.80, 717,628.20 and 346,542.70 is: 519,814.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,418.80 : 717,628.20 = 346,542.70 : x
  2. Step 2: Convert to fraction form
    478,418.80/717,628.20 = 346,542.70/x
  3. Step 3: Cross multiply
    478,418.80x = 717,628.20 × 346,542.70
  4. Step 4: Simplify right side
    478,418.80x = 248,688,814,024.14
  5. Step 5: Solve for x
    x = 248,688,814,024.14/478,418.80
  6. Step 6: Final answer
    x = 519,814.05

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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.