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Finding the Fourth Proportional to 953.71, 1,430.43 and 260.42

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Solution

The fourth proportional to 953.71, 1,430.43 and 260.42 is: 390.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.71 : 1,430.43 = 260.42 : x
  2. Step 2: Convert to fraction form
    953.71/1,430.43 = 260.42/x
  3. Step 3: Cross multiply
    953.71x = 1,430.43 × 260.42
  4. Step 4: Simplify right side
    953.71x = 372,512.58
  5. Step 5: Solve for x
    x = 372,512.58/953.71
  6. Step 6: Final answer
    x = 390.59

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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.