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Finding the Fourth Proportional to 639,314.20, 958,315.20 and 372,937.60

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Solution

The fourth proportional to 639,314.20, 958,315.20 and 372,937.60 is: 559,023.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,314.20 : 958,315.20 = 372,937.60 : x
  2. Step 2: Convert to fraction form
    639,314.20/958,315.20 = 372,937.60/x
  3. Step 3: Cross multiply
    639,314.20x = 958,315.20 × 372,937.60
  4. Step 4: Simplify right side
    639,314.20x = 357,391,770,731.52
  5. Step 5: Solve for x
    x = 357,391,770,731.52/639,314.20
  6. Step 6: Final answer
    x = 559,023.67

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1.5x scale

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.