Home / 291,720.18-402,648.75-189,999.12

Finding the Fourth Proportional to 291,720.18, 402,648.75 and 189,999.12

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Solution

The fourth proportional to 291,720.18, 402,648.75 and 189,999.12 is: 262,247.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,720.18 : 402,648.75 = 189,999.12 : x
  2. Step 2: Convert to fraction form
    291,720.18/402,648.75 = 189,999.12/x
  3. Step 3: Cross multiply
    291,720.18x = 402,648.75 × 189,999.12
  4. Step 4: Simplify right side
    291,720.18x = 76,502,908,169.10
  5. Step 5: Solve for x
    x = 76,502,908,169.10/291,720.18
  6. Step 6: Final answer
    x = 262,247.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.