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Finding the Fourth Proportional to 280,715.94, 387,389.00 and 153,391.54

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Solution

The fourth proportional to 280,715.94, 387,389.00 and 153,391.54 is: 211,680.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,715.94 : 387,389.00 = 153,391.54 : x
  2. Step 2: Convert to fraction form
    280,715.94/387,389.00 = 153,391.54/x
  3. Step 3: Cross multiply
    280,715.94x = 387,389.00 × 153,391.54
  4. Step 4: Simplify right side
    280,715.94x = 59,422,192,585.16
  5. Step 5: Solve for x
    x = 59,422,192,585.16/280,715.94
  6. Step 6: Final answer
    x = 211,680.86

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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.