Home / 280,739.40-387,419.58-153,415.80

Finding the Fourth Proportional to 280,739.40, 387,419.58 and 153,415.80

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Solution

The fourth proportional to 280,739.40, 387,419.58 and 153,415.80 is: 211,713.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,739.40 : 387,419.58 = 153,415.80 : x
  2. Step 2: Convert to fraction form
    280,739.40/387,419.58 = 153,415.80/x
  3. Step 3: Cross multiply
    280,739.40x = 387,419.58 × 153,415.80
  4. Step 4: Simplify right side
    280,739.40x = 59,436,284,801.36
  5. Step 5: Solve for x
    x = 59,436,284,801.36/280,739.40
  6. Step 6: Final answer
    x = 211,713.37

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1.5x scale

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.