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Finding the Fourth Proportional to 878,978,823.40, 1,318,678,187.10 and 265,569,063.40

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Solution

The fourth proportional to 878,978,823.40, 1,318,678,187.10 and 265,569,063.40 is: 398,417,028.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,978,823.40 : 1,318,678,187.10 = 265,569,063.40 : x
  2. Step 2: Convert to fraction form
    878,978,823.40/1,318,678,187.10 = 265,569,063.40/x
  3. Step 3: Cross multiply
    878,978,823.40x = 1,318,678,187.10 × 265,569,063.40
  4. Step 4: Simplify right side
    878,978,823.40x = 350,200,131,074,156,928
  5. Step 5: Solve for x
    x = 350,200,131,074,156,928/878,978,823.40
  6. Step 6: Final answer
    x = 398,417,028.66

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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.