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Finding the Fourth Proportional to 649,915.20, 975,448.80 and 383,342.40

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Solution

The fourth proportional to 649,915.20, 975,448.80 and 383,342.40 is: 575,353.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    649,915.20 : 975,448.80 = 383,342.40 : x
  2. Step 2: Convert to fraction form
    649,915.20/975,448.80 = 383,342.40/x
  3. Step 3: Cross multiply
    649,915.20x = 975,448.80 × 383,342.40
  4. Step 4: Simplify right side
    649,915.20x = 373,930,884,069.12
  5. Step 5: Solve for x
    x = 373,930,884,069.12/649,915.20
  6. Step 6: Final answer
    x = 575,353.34

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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.