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Finding the Fourth Proportional to 1,318,568.64, 1,819,617.12 and 714,943.68

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Solution

The fourth proportional to 1,318,568.64, 1,819,617.12 and 714,943.68 is: 986,618.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318,568.64 : 1,819,617.12 = 714,943.68 : x
  2. Step 2: Convert to fraction form
    1,318,568.64/1,819,617.12 = 714,943.68/x
  3. Step 3: Cross multiply
    1,318,568.64x = 1,819,617.12 × 714,943.68
  4. Step 4: Simplify right side
    1,318,568.64x = 1,300,923,759,963.80
  5. Step 5: Solve for x
    x = 1,300,923,759,963.80/1,318,568.64
  6. Step 6: Final answer
    x = 986,618.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.