Home / 280,463.50-387,038.09-153,138.18

Finding the Fourth Proportional to 280,463.50, 387,038.09 and 153,138.18

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Solution

The fourth proportional to 280,463.50, 387,038.09 and 153,138.18 is: 211,329.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,463.50 : 387,038.09 = 153,138.18 : x
  2. Step 2: Convert to fraction form
    280,463.50/387,038.09 = 153,138.18/x
  3. Step 3: Cross multiply
    280,463.50x = 387,038.09 × 153,138.18
  4. Step 4: Simplify right side
    280,463.50x = 59,270,306,758.09
  5. Step 5: Solve for x
    x = 59,270,306,758.09/280,463.50
  6. Step 6: Final answer
    x = 211,329.84

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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.