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Finding the Fourth Proportional to 1,007.61, 1,511.50 and 277.19

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Solution

The fourth proportional to 1,007.61, 1,511.50 and 277.19 is: 415.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,007.61 : 1,511.50 = 277.19 : x
  2. Step 2: Convert to fraction form
    1,007.61/1,511.50 = 277.19/x
  3. Step 3: Cross multiply
    1,007.61x = 1,511.50 × 277.19
  4. Step 4: Simplify right side
    1,007.61x = 418,963.74
  5. Step 5: Solve for x
    x = 418,963.74/1,007.61
  6. Step 6: Final answer
    x = 415.80

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Double scale
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Similar ratio
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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.