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Finding the Fourth Proportional to 318,041.40, 477,280.80 and 131,052.90

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Solution

The fourth proportional to 318,041.40, 477,280.80 and 131,052.90 is: 196,669.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,041.40 : 477,280.80 = 131,052.90 : x
  2. Step 2: Convert to fraction form
    318,041.40/477,280.80 = 131,052.90/x
  3. Step 3: Cross multiply
    318,041.40x = 477,280.80 × 131,052.90
  4. Step 4: Simplify right side
    318,041.40x = 62,549,032,954.32
  5. Step 5: Solve for x
    x = 62,549,032,954.32/318,041.40
  6. Step 6: Final answer
    x = 196,669.47

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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.