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Finding the Fourth Proportional to 487,689.21, 731,696.28 and 163,509.38

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Solution

The fourth proportional to 487,689.21, 731,696.28 and 163,509.38 is: 245,318.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,689.21 : 731,696.28 = 163,509.38 : x
  2. Step 2: Convert to fraction form
    487,689.21/731,696.28 = 163,509.38/x
  3. Step 3: Cross multiply
    487,689.21x = 731,696.28 × 163,509.38
  4. Step 4: Simplify right side
    487,689.21x = 119,639,205,091.11
  5. Step 5: Solve for x
    x = 119,639,205,091.11/487,689.21
  6. Step 6: Final answer
    x = 245,318.54

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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.