Home / 1,946.10-2,919.18-647.67

Finding the Fourth Proportional to 1,946.10, 2,919.18 and 647.67

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Solution

The fourth proportional to 1,946.10, 2,919.18 and 647.67 is: 971.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,946.10 : 2,919.18 = 647.67 : x
  2. Step 2: Convert to fraction form
    1,946.10/2,919.18 = 647.67/x
  3. Step 3: Cross multiply
    1,946.10x = 2,919.18 × 647.67
  4. Step 4: Simplify right side
    1,946.10x = 1,890,665.31
  5. Step 5: Solve for x
    x = 1,890,665.31/1,946.10
  6. Step 6: Final answer
    x = 971.51

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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.