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Finding the Fourth Proportional to 317,794.95, 438,560.19 and 172,603.56

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Solution

The fourth proportional to 317,794.95, 438,560.19 and 172,603.56 is: 238,194.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,794.95 : 438,560.19 = 172,603.56 : x
  2. Step 2: Convert to fraction form
    317,794.95/438,560.19 = 172,603.56/x
  3. Step 3: Cross multiply
    317,794.95x = 438,560.19 × 172,603.56
  4. Step 4: Simplify right side
    317,794.95x = 75,697,050,068.28
  5. Step 5: Solve for x
    x = 75,697,050,068.28/317,794.95
  6. Step 6: Final answer
    x = 238,194.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.