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Finding the Fourth Proportional to 313,438.16, 470,154 and 76,782.08

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Solution

The fourth proportional to 313,438.16, 470,154 and 76,782.08 is: 115,172.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,438.16 : 470,154 = 76,782.08 : x
  2. Step 2: Convert to fraction form
    313,438.16/470,154 = 76,782.08/x
  3. Step 3: Cross multiply
    313,438.16x = 470,154 × 76,782.08
  4. Step 4: Simplify right side
    313,438.16x = 36,099,402,040.32
  5. Step 5: Solve for x
    x = 36,099,402,040.32/313,438.16
  6. Step 6: Final answer
    x = 115,172.33

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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.