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Finding the Fourth Proportional to 6,390, 9,585.36 and 1,709.91

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Solution

The fourth proportional to 6,390, 9,585.36 and 1,709.91 is: 2,564.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,390 : 9,585.36 = 1,709.91 : x
  2. Step 2: Convert to fraction form
    6,390/9,585.36 = 1,709.91/x
  3. Step 3: Cross multiply
    6,390x = 9,585.36 × 1,709.91
  4. Step 4: Simplify right side
    6,390x = 16,390,102.92
  5. Step 5: Solve for x
    x = 16,390,102.92/6,390
  6. Step 6: Final answer
    x = 2,564.96

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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.