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Finding the Fourth Proportional to 280,661.48, 387,722.64 and 242,870.12

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Solution

The fourth proportional to 280,661.48, 387,722.64 and 242,870.12 is: 335,515.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,661.48 : 387,722.64 = 242,870.12 : x
  2. Step 2: Convert to fraction form
    280,661.48/387,722.64 = 242,870.12/x
  3. Step 3: Cross multiply
    280,661.48x = 387,722.64 × 242,870.12
  4. Step 4: Simplify right side
    280,661.48x = 94,166,244,103.52
  5. Step 5: Solve for x
    x = 94,166,244,103.52/280,661.48
  6. Step 6: Final answer
    x = 335,515.38

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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.