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Finding the Fourth Proportional to 1,299.93, 1,953.54 and 651.12

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Solution

The fourth proportional to 1,299.93, 1,953.54 and 651.12 is: 978.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,299.93 : 1,953.54 = 651.12 : x
  2. Step 2: Convert to fraction form
    1,299.93/1,953.54 = 651.12/x
  3. Step 3: Cross multiply
    1,299.93x = 1,953.54 × 651.12
  4. Step 4: Simplify right side
    1,299.93x = 1,271,988.96
  5. Step 5: Solve for x
    x = 1,271,988.96/1,299.93
  6. Step 6: Final answer
    x = 978.51

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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.