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Finding the Fourth Proportional to 383,480.28, 530,159.40 and 287,820.90

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Solution

The fourth proportional to 383,480.28, 530,159.40 and 287,820.90 is: 397,910.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,480.28 : 530,159.40 = 287,820.90 : x
  2. Step 2: Convert to fraction form
    383,480.28/530,159.40 = 287,820.90/x
  3. Step 3: Cross multiply
    383,480.28x = 530,159.40 × 287,820.90
  4. Step 4: Simplify right side
    383,480.28x = 152,590,955,651.46
  5. Step 5: Solve for x
    x = 152,590,955,651.46/383,480.28
  6. Step 6: Final answer
    x = 397,910.83

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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.