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Finding the Fourth Proportional to 315,085.69, 434,855.64 and 179,140.15

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Solution

The fourth proportional to 315,085.69, 434,855.64 and 179,140.15 is: 247,234.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,085.69 : 434,855.64 = 179,140.15 : x
  2. Step 2: Convert to fraction form
    315,085.69/434,855.64 = 179,140.15/x
  3. Step 3: Cross multiply
    315,085.69x = 434,855.64 × 179,140.15
  4. Step 4: Simplify right side
    315,085.69x = 77,900,104,577.95
  5. Step 5: Solve for x
    x = 77,900,104,577.95/315,085.69
  6. Step 6: Final answer
    x = 247,234.66

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1.5x scale

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.