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Finding the Fourth Proportional to 262,138.40, 392,624.40 and 215,482.40

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Solution

The fourth proportional to 262,138.40, 392,624.40 and 215,482.40 is: 322,744.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,138.40 : 392,624.40 = 215,482.40 : x
  2. Step 2: Convert to fraction form
    262,138.40/392,624.40 = 215,482.40/x
  3. Step 3: Cross multiply
    262,138.40x = 392,624.40 × 215,482.40
  4. Step 4: Simplify right side
    262,138.40x = 84,603,648,010.56
  5. Step 5: Solve for x
    x = 84,603,648,010.56/262,138.40
  6. Step 6: Final answer
    x = 322,744.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.