Home / 280,467.72-387,061.20-153,155.16

Finding the Fourth Proportional to 280,467.72, 387,061.20 and 153,155.16

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Solution

The fourth proportional to 280,467.72, 387,061.20 and 153,155.16 is: 211,362.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,467.72 : 387,061.20 = 153,155.16 : x
  2. Step 2: Convert to fraction form
    280,467.72/387,061.20 = 153,155.16/x
  3. Step 3: Cross multiply
    280,467.72x = 387,061.20 × 153,155.16
  4. Step 4: Simplify right side
    280,467.72x = 59,280,420,015.79
  5. Step 5: Solve for x
    x = 59,280,420,015.79/280,467.72
  6. Step 6: Final answer
    x = 211,362.72

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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.