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Finding the Fourth Proportional to 276,827.40, 387,820.80 and 276,827.40

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Solution

The fourth proportional to 276,827.40, 387,820.80 and 276,827.40 is: 387,820.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,827.40 : 387,820.80 = 276,827.40 : x
  2. Step 2: Convert to fraction form
    276,827.40/387,820.80 = 276,827.40/x
  3. Step 3: Cross multiply
    276,827.40x = 387,820.80 × 276,827.40
  4. Step 4: Simplify right side
    276,827.40x = 107,359,423,729.92
  5. Step 5: Solve for x
    x = 107,359,423,729.92/276,827.40
  6. Step 6: Final answer
    x = 387,820.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.