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Finding the Fourth Proportional to 318,210.77, 477,448.34 and 128,805.03

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Solution

The fourth proportional to 318,210.77, 477,448.34 and 128,805.03 is: 193,261.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,210.77 : 477,448.34 = 128,805.03 : x
  2. Step 2: Convert to fraction form
    318,210.77/477,448.34 = 128,805.03/x
  3. Step 3: Cross multiply
    318,210.77x = 477,448.34 × 128,805.03
  4. Step 4: Simplify right side
    318,210.77x = 61,497,747,113.13
  5. Step 5: Solve for x
    x = 61,497,747,113.13/318,210.77
  6. Step 6: Final answer
    x = 193,261.05

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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.