Home / 762,666.30-1,145,129.40-426,378.60

Finding the Fourth Proportional to 762,666.30, 1,145,129.40 and 426,378.60

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Solution

The fourth proportional to 762,666.30, 1,145,129.40 and 426,378.60 is: 640,199.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    762,666.30 : 1,145,129.40 = 426,378.60 : x
  2. Step 2: Convert to fraction form
    762,666.30/1,145,129.40 = 426,378.60/x
  3. Step 3: Cross multiply
    762,666.30x = 1,145,129.40 × 426,378.60
  4. Step 4: Simplify right side
    762,666.30x = 488,258,670,390.84
  5. Step 5: Solve for x
    x = 488,258,670,390.84/762,666.30
  6. Step 6: Final answer
    x = 640,199.61

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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.