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Finding the Fourth Proportional to 1,120.07, 1,680.23 and 340.07

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Solution

The fourth proportional to 1,120.07, 1,680.23 and 340.07 is: 510.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120.07 : 1,680.23 = 340.07 : x
  2. Step 2: Convert to fraction form
    1,120.07/1,680.23 = 340.07/x
  3. Step 3: Cross multiply
    1,120.07x = 1,680.23 × 340.07
  4. Step 4: Simplify right side
    1,120.07x = 571,395.82
  5. Step 5: Solve for x
    x = 571,395.82/1,120.07
  6. Step 6: Final answer
    x = 510.14

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Half scale
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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.