Home / 1,312.61-1,968.89-446.90

Finding the Fourth Proportional to 1,312.61, 1,968.89 and 446.90

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Solution

The fourth proportional to 1,312.61, 1,968.89 and 446.90 is: 670.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312.61 : 1,968.89 = 446.90 : x
  2. Step 2: Convert to fraction form
    1,312.61/1,968.89 = 446.90/x
  3. Step 3: Cross multiply
    1,312.61x = 1,968.89 × 446.90
  4. Step 4: Simplify right side
    1,312.61x = 879,884.86
  5. Step 5: Solve for x
    x = 879,884.86/1,312.61
  6. Step 6: Final answer
    x = 670.33

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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.