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Finding the Fourth Proportional to 478,887.80, 718,331.70 and 266,311.40

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Solution

The fourth proportional to 478,887.80, 718,331.70 and 266,311.40 is: 399,467.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,887.80 : 718,331.70 = 266,311.40 : x
  2. Step 2: Convert to fraction form
    478,887.80/718,331.70 = 266,311.40/x
  3. Step 3: Cross multiply
    478,887.80x = 718,331.70 × 266,311.40
  4. Step 4: Simplify right side
    478,887.80x = 191,299,920,691.38
  5. Step 5: Solve for x
    x = 191,299,920,691.38/478,887.80
  6. Step 6: Final answer
    x = 399,467.10

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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.