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Finding the Fourth Proportional to 638,603.10, 956,679.90 and 358,317.18

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Solution

The fourth proportional to 638,603.10, 956,679.90 and 358,317.18 is: 536,788.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,603.10 : 956,679.90 = 358,317.18 : x
  2. Step 2: Convert to fraction form
    638,603.10/956,679.90 = 358,317.18/x
  3. Step 3: Cross multiply
    638,603.10x = 956,679.90 × 358,317.18
  4. Step 4: Simplify right side
    638,603.10x = 342,794,843,930.68
  5. Step 5: Solve for x
    x = 342,794,843,930.68/638,603.10
  6. Step 6: Final answer
    x = 536,788.57

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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.