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Finding the Fourth Proportional to 874.42, 1,311.58 and 435.51

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Solution

The fourth proportional to 874.42, 1,311.58 and 435.51 is: 653.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    874.42 : 1,311.58 = 435.51 : x
  2. Step 2: Convert to fraction form
    874.42/1,311.58 = 435.51/x
  3. Step 3: Cross multiply
    874.42x = 1,311.58 × 435.51
  4. Step 4: Simplify right side
    874.42x = 571,206.21
  5. Step 5: Solve for x
    x = 571,206.21/874.42
  6. Step 6: Final answer
    x = 653.24

Related Problems

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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.