Home / 280,739.22-387,428.58-153,416.94

Finding the Fourth Proportional to 280,739.22, 387,428.58 and 153,416.94

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Solution

The fourth proportional to 280,739.22, 387,428.58 and 153,416.94 is: 211,720.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,739.22 : 387,428.58 = 153,416.94 : x
  2. Step 2: Convert to fraction form
    280,739.22/387,428.58 = 153,416.94/x
  3. Step 3: Cross multiply
    280,739.22x = 387,428.58 × 153,416.94
  4. Step 4: Simplify right side
    280,739.22x = 59,438,107,212.15
  5. Step 5: Solve for x
    x = 59,438,107,212.15/280,739.22
  6. Step 6: Final answer
    x = 211,720.00

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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.