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Finding the Fourth Proportional to 1,060.05, 1,588.36 and 647.93

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Solution

The fourth proportional to 1,060.05, 1,588.36 and 647.93 is: 970.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,060.05 : 1,588.36 = 647.93 : x
  2. Step 2: Convert to fraction form
    1,060.05/1,588.36 = 647.93/x
  3. Step 3: Cross multiply
    1,060.05x = 1,588.36 × 647.93
  4. Step 4: Simplify right side
    1,060.05x = 1,029,146.09
  5. Step 5: Solve for x
    x = 1,029,146.09/1,060.05
  6. Step 6: Final answer
    x = 970.85

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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.