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Finding the Fourth Proportional to 213,095.80, 319,254.90 and 173,438.20

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Solution

The fourth proportional to 213,095.80, 319,254.90 and 173,438.20 is: 259,840.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,095.80 : 319,254.90 = 173,438.20 : x
  2. Step 2: Convert to fraction form
    213,095.80/319,254.90 = 173,438.20/x
  3. Step 3: Cross multiply
    213,095.80x = 319,254.90 × 173,438.20
  4. Step 4: Simplify right side
    213,095.80x = 55,370,995,197.18
  5. Step 5: Solve for x
    x = 55,370,995,197.18/213,095.80
  6. Step 6: Final answer
    x = 259,840.86

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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.