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Finding the Fourth Proportional to 953.02, 1,428 and 708.31

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Solution

The fourth proportional to 953.02, 1,428 and 708.31 is: 1,061.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.02 : 1,428 = 708.31 : x
  2. Step 2: Convert to fraction form
    953.02/1,428 = 708.31/x
  3. Step 3: Cross multiply
    953.02x = 1,428 × 708.31
  4. Step 4: Simplify right side
    953.02x = 1,011,466.68
  5. Step 5: Solve for x
    x = 1,011,466.68/953.02
  6. Step 6: Final answer
    x = 1,061.33

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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.