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Finding the Fourth Proportional to 330,275.40, 495,429.30 and 172,811.40

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Solution

The fourth proportional to 330,275.40, 495,429.30 and 172,811.40 is: 259,225.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,275.40 : 495,429.30 = 172,811.40 : x
  2. Step 2: Convert to fraction form
    330,275.40/495,429.30 = 172,811.40/x
  3. Step 3: Cross multiply
    330,275.40x = 495,429.30 × 172,811.40
  4. Step 4: Simplify right side
    330,275.40x = 85,615,830,934.02
  5. Step 5: Solve for x
    x = 85,615,830,934.02/330,275.40
  6. Step 6: Final answer
    x = 259,225.58

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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.