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Finding the Fourth Proportional to 878,656.64, 1,317,480.48 and 345,887.03

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Solution

The fourth proportional to 878,656.64, 1,317,480.48 and 345,887.03 is: 518,631.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,656.64 : 1,317,480.48 = 345,887.03 : x
  2. Step 2: Convert to fraction form
    878,656.64/1,317,480.48 = 345,887.03/x
  3. Step 3: Cross multiply
    878,656.64x = 1,317,480.48 × 345,887.03
  4. Step 4: Simplify right side
    878,656.64x = 455,699,403,722.77
  5. Step 5: Solve for x
    x = 455,699,403,722.77/878,656.64
  6. Step 6: Final answer
    x = 518,631.95

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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.