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Finding the Fourth Proportional to 313,879.02, 472,526.62 and 285,978.30

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Solution

The fourth proportional to 313,879.02, 472,526.62 and 285,978.30 is: 430,523.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,879.02 : 472,526.62 = 285,978.30 : x
  2. Step 2: Convert to fraction form
    313,879.02/472,526.62 = 285,978.30/x
  3. Step 3: Cross multiply
    313,879.02x = 472,526.62 × 285,978.30
  4. Step 4: Simplify right side
    313,879.02x = 135,132,359,492.35
  5. Step 5: Solve for x
    x = 135,132,359,492.35/313,879.02
  6. Step 6: Final answer
    x = 430,523.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.