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Finding the Fourth Proportional to 316,168.68, 436,323.21 and 172,928.73

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Solution

The fourth proportional to 316,168.68, 436,323.21 and 172,928.73 is: 238,647.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,168.68 : 436,323.21 = 172,928.73 : x
  2. Step 2: Convert to fraction form
    316,168.68/436,323.21 = 172,928.73/x
  3. Step 3: Cross multiply
    316,168.68x = 436,323.21 × 172,928.73
  4. Step 4: Simplify right side
    316,168.68x = 75,452,818,574.82
  5. Step 5: Solve for x
    x = 75,452,818,574.82/316,168.68
  6. Step 6: Final answer
    x = 238,647.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.