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Finding the Fourth Proportional to 312,678.39, 469,017.60 and 76,019.49

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Solution

The fourth proportional to 312,678.39, 469,017.60 and 76,019.49 is: 114,029.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,678.39 : 469,017.60 = 76,019.49 : x
  2. Step 2: Convert to fraction form
    312,678.39/469,017.60 = 76,019.49/x
  3. Step 3: Cross multiply
    312,678.39x = 469,017.60 × 76,019.49
  4. Step 4: Simplify right side
    312,678.39x = 35,654,478,753.02
  5. Step 5: Solve for x
    x = 35,654,478,753.02/312,678.39
  6. Step 6: Final answer
    x = 114,029.24

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1.5x scale

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.