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Finding the Fourth Proportional to 878,969, 1,317,671.58 and 317,878.76

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Solution

The fourth proportional to 878,969, 1,317,671.58 and 317,878.76 is: 476,535.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,969 : 1,317,671.58 = 317,878.76 : x
  2. Step 2: Convert to fraction form
    878,969/1,317,671.58 = 317,878.76/x
  3. Step 3: Cross multiply
    878,969x = 1,317,671.58 × 317,878.76
  4. Step 4: Simplify right side
    878,969x = 418,859,807,937.64
  5. Step 5: Solve for x
    x = 418,859,807,937.64/878,969
  6. Step 6: Final answer
    x = 476,535.36

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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.