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Finding the Fourth Proportional to 191,987.40, 287,756.82 and 144,449.76

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Solution

The fourth proportional to 191,987.40, 287,756.82 and 144,449.76 is: 216,505.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,987.40 : 287,756.82 = 144,449.76 : x
  2. Step 2: Convert to fraction form
    191,987.40/287,756.82 = 144,449.76/x
  3. Step 3: Cross multiply
    191,987.40x = 287,756.82 × 144,449.76
  4. Step 4: Simplify right side
    191,987.40x = 41,566,403,587.36
  5. Step 5: Solve for x
    x = 41,566,403,587.36/191,987.40
  6. Step 6: Final answer
    x = 216,505.89

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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.