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Finding the Fourth Proportional to 191,615.70, 287,423.55 and 172,953.30

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Solution

The fourth proportional to 191,615.70, 287,423.55 and 172,953.30 is: 259,429.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,615.70 : 287,423.55 = 172,953.30 : x
  2. Step 2: Convert to fraction form
    191,615.70/287,423.55 = 172,953.30/x
  3. Step 3: Cross multiply
    191,615.70x = 287,423.55 × 172,953.30
  4. Step 4: Simplify right side
    191,615.70x = 49,710,851,470.22
  5. Step 5: Solve for x
    x = 49,710,851,470.22/191,615.70
  6. Step 6: Final answer
    x = 259,429.95

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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.