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Finding the Fourth Proportional to 878,760.60, 1,318,140.90 and 317,813.40

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Solution

The fourth proportional to 878,760.60, 1,318,140.90 and 317,813.40 is: 476,720.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,760.60 : 1,318,140.90 = 317,813.40 : x
  2. Step 2: Convert to fraction form
    878,760.60/1,318,140.90 = 317,813.40/x
  3. Step 3: Cross multiply
    878,760.60x = 1,318,140.90 × 317,813.40
  4. Step 4: Simplify right side
    878,760.60x = 418,922,841,108.06
  5. Step 5: Solve for x
    x = 418,922,841,108.06/878,760.60
  6. Step 6: Final answer
    x = 476,720.10

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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.