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Finding the Fourth Proportional to 953.83, 1,431.20 and 434.20

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Solution

The fourth proportional to 953.83, 1,431.20 and 434.20 is: 651.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.83 : 1,431.20 = 434.20 : x
  2. Step 2: Convert to fraction form
    953.83/1,431.20 = 434.20/x
  3. Step 3: Cross multiply
    953.83x = 1,431.20 × 434.20
  4. Step 4: Simplify right side
    953.83x = 621,427.04
  5. Step 5: Solve for x
    x = 621,427.04/953.83
  6. Step 6: Final answer
    x = 651.51

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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.