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Finding the Fourth Proportional to 878,978,826.40, 1,318,678,191.60 and 265,569,066.40

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Solution

The fourth proportional to 878,978,826.40, 1,318,678,191.60 and 265,569,066.40 is: 398,417,033.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,978,826.40 : 1,318,678,191.60 = 265,569,066.40 : x
  2. Step 2: Convert to fraction form
    878,978,826.40/1,318,678,191.60 = 265,569,066.40/x
  3. Step 3: Cross multiply
    878,978,826.40x = 1,318,678,191.60 × 265,569,066.40
  4. Step 4: Simplify right side
    878,978,826.40x = 350,200,136,225,252,288
  5. Step 5: Solve for x
    x = 350,200,136,225,252,288/878,978,826.40
  6. Step 6: Final answer
    x = 398,417,033.16

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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.