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Finding the Fourth Proportional to 313,873.40, 470,802.78 and 77,218.16

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Solution

The fourth proportional to 313,873.40, 470,802.78 and 77,218.16 is: 115,825.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,873.40 : 470,802.78 = 77,218.16 : x
  2. Step 2: Convert to fraction form
    313,873.40/470,802.78 = 77,218.16/x
  3. Step 3: Cross multiply
    313,873.40x = 470,802.78 × 77,218.16
  4. Step 4: Simplify right side
    313,873.40x = 36,354,524,394.48
  5. Step 5: Solve for x
    x = 36,354,524,394.48/313,873.40
  6. Step 6: Final answer
    x = 115,825.44

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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.