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Finding the Fourth Proportional to 869,812.40, 1,304,718.60 and 838,319.60

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Solution

The fourth proportional to 869,812.40, 1,304,718.60 and 838,319.60 is: 1,257,479.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    869,812.40 : 1,304,718.60 = 838,319.60 : x
  2. Step 2: Convert to fraction form
    869,812.40/1,304,718.60 = 838,319.60/x
  3. Step 3: Cross multiply
    869,812.40x = 1,304,718.60 × 838,319.60
  4. Step 4: Simplify right side
    869,812.40x = 1,093,771,174,864.56
  5. Step 5: Solve for x
    x = 1,093,771,174,864.56/869,812.40
  6. Step 6: Final answer
    x = 1,257,479.40

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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.