Home / 318,984.20-478,460.38-119,289.90

Finding the Fourth Proportional to 318,984.20, 478,460.38 and 119,289.90

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Solution

The fourth proportional to 318,984.20, 478,460.38 and 119,289.90 is: 178,928.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,984.20 : 478,460.38 = 119,289.90 : x
  2. Step 2: Convert to fraction form
    318,984.20/478,460.38 = 119,289.90/x
  3. Step 3: Cross multiply
    318,984.20x = 478,460.38 × 119,289.90
  4. Step 4: Simplify right side
    318,984.20x = 57,075,490,884.16
  5. Step 5: Solve for x
    x = 57,075,490,884.16/318,984.20
  6. Step 6: Final answer
    x = 178,928.90

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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.