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Finding the Fourth Proportional to 478,873.80, 718,310.70 and 266,297.40

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Solution

The fourth proportional to 478,873.80, 718,310.70 and 266,297.40 is: 399,446.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,873.80 : 718,310.70 = 266,297.40 : x
  2. Step 2: Convert to fraction form
    478,873.80/718,310.70 = 266,297.40/x
  3. Step 3: Cross multiply
    478,873.80x = 718,310.70 × 266,297.40
  4. Step 4: Simplify right side
    478,873.80x = 191,284,271,802.18
  5. Step 5: Solve for x
    x = 191,284,271,802.18/478,873.80
  6. Step 6: Final answer
    x = 399,446.10

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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.