Home / 398,767,568.40-598,767,211.80-217,369,040.40

Finding the Fourth Proportional to 398,767,568.40, 598,767,211.80 and 217,369,040.40

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Solution

The fourth proportional to 398,767,568.40, 598,767,211.80 and 217,369,040.40 is: 326,389,266.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,767,568.40 : 598,767,211.80 = 217,369,040.40 : x
  2. Step 2: Convert to fraction form
    398,767,568.40/598,767,211.80 = 217,369,040.40/x
  3. Step 3: Cross multiply
    398,767,568.40x = 598,767,211.80 × 217,369,040.40
  4. Step 4: Simplify right side
    398,767,568.40x = 130,153,454,251,949,552
  5. Step 5: Solve for x
    x = 130,153,454,251,949,552/398,767,568.40
  6. Step 6: Final answer
    x = 326,389,266.75

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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.