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Finding the Fourth Proportional to 577,872.40, 866,808.60 and 388,915.60

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Solution

The fourth proportional to 577,872.40, 866,808.60 and 388,915.60 is: 583,373.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    577,872.40 : 866,808.60 = 388,915.60 : x
  2. Step 2: Convert to fraction form
    577,872.40/866,808.60 = 388,915.60/x
  3. Step 3: Cross multiply
    577,872.40x = 866,808.60 × 388,915.60
  4. Step 4: Simplify right side
    577,872.40x = 337,115,386,754.16
  5. Step 5: Solve for x
    x = 337,115,386,754.16/577,872.40
  6. Step 6: Final answer
    x = 583,373.40

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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.