Home / 280,686.25-387,355.53-153,370.05

Finding the Fourth Proportional to 280,686.25, 387,355.53 and 153,370.05

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Solution

The fourth proportional to 280,686.25, 387,355.53 and 153,370.05 is: 211,655.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,686.25 : 387,355.53 = 153,370.05 : x
  2. Step 2: Convert to fraction form
    280,686.25/387,355.53 = 153,370.05/x
  3. Step 3: Cross multiply
    280,686.25x = 387,355.53 × 153,370.05
  4. Step 4: Simplify right side
    280,686.25x = 59,408,737,003.88
  5. Step 5: Solve for x
    x = 59,408,737,003.88/280,686.25
  6. Step 6: Final answer
    x = 211,655.32

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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.