Home / 1,630.61-2,256.18-1,421.23

Finding the Fourth Proportional to 1,630.61, 2,256.18 and 1,421.23

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Solution

The fourth proportional to 1,630.61, 2,256.18 and 1,421.23 is: 1,966.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,630.61 : 2,256.18 = 1,421.23 : x
  2. Step 2: Convert to fraction form
    1,630.61/2,256.18 = 1,421.23/x
  3. Step 3: Cross multiply
    1,630.61x = 2,256.18 × 1,421.23
  4. Step 4: Simplify right side
    1,630.61x = 3,206,539.42
  5. Step 5: Solve for x
    x = 3,206,539.42/1,630.61
  6. Step 6: Final answer
    x = 1,966.47

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.