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Finding the Fourth Proportional to 3,068.61, 4,603.18 and 988.66

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Solution

The fourth proportional to 3,068.61, 4,603.18 and 988.66 is: 1,483.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,068.61 : 4,603.18 = 988.66 : x
  2. Step 2: Convert to fraction form
    3,068.61/4,603.18 = 988.66/x
  3. Step 3: Cross multiply
    3,068.61x = 4,603.18 × 988.66
  4. Step 4: Simplify right side
    3,068.61x = 4,550,979.94
  5. Step 5: Solve for x
    x = 4,550,979.94/3,068.61
  6. Step 6: Final answer
    x = 1,483.08

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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.