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Finding the Fourth Proportional to 262,421.70, 393,632.55 and 120,266.70

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Solution

The fourth proportional to 262,421.70, 393,632.55 and 120,266.70 is: 180,400.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,421.70 : 393,632.55 = 120,266.70 : x
  2. Step 2: Convert to fraction form
    262,421.70/393,632.55 = 120,266.70/x
  3. Step 3: Cross multiply
    262,421.70x = 393,632.55 × 120,266.70
  4. Step 4: Simplify right side
    262,421.70x = 47,340,887,801.09
  5. Step 5: Solve for x
    x = 47,340,887,801.09/262,421.70
  6. Step 6: Final answer
    x = 180,400.05

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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.