Home / 840,721.21-1,261,281.92-272,102.32

Finding the Fourth Proportional to 840,721.21, 1,261,281.92 and 272,102.32

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Solution

The fourth proportional to 840,721.21, 1,261,281.92 and 272,102.32 is: 408,218.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    840,721.21 : 1,261,281.92 = 272,102.32 : x
  2. Step 2: Convert to fraction form
    840,721.21/1,261,281.92 = 272,102.32/x
  3. Step 3: Cross multiply
    840,721.21x = 1,261,281.92 × 272,102.32
  4. Step 4: Simplify right side
    840,721.21x = 343,197,736,822.15
  5. Step 5: Solve for x
    x = 343,197,736,822.15/840,721.21
  6. Step 6: Final answer
    x = 408,218.25

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1.5x scale

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.