Home / 280,775.12-387,468.76-153,450.68

Finding the Fourth Proportional to 280,775.12, 387,468.76 and 153,450.68

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Solution

The fourth proportional to 280,775.12, 387,468.76 and 153,450.68 is: 211,761.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,775.12 : 387,468.76 = 153,450.68 : x
  2. Step 2: Convert to fraction form
    280,775.12/387,468.76 = 153,450.68/x
  3. Step 3: Cross multiply
    280,775.12x = 387,468.76 × 153,450.68
  4. Step 4: Simplify right side
    280,775.12x = 59,457,344,700.76
  5. Step 5: Solve for x
    x = 59,457,344,700.76/280,775.12
  6. Step 6: Final answer
    x = 211,761.44

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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.