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Finding the Fourth Proportional to 319,121.60, 478,682.40 and 262,040.90

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Solution

The fourth proportional to 319,121.60, 478,682.40 and 262,040.90 is: 393,061.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,121.60 : 478,682.40 = 262,040.90 : x
  2. Step 2: Convert to fraction form
    319,121.60/478,682.40 = 262,040.90/x
  3. Step 3: Cross multiply
    319,121.60x = 478,682.40 × 262,040.90
  4. Step 4: Simplify right side
    319,121.60x = 125,434,366,910.16
  5. Step 5: Solve for x
    x = 125,434,366,910.16/319,121.60
  6. Step 6: Final answer
    x = 393,061.35

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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.