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Finding the Fourth Proportional to 280,790.29, 387,491.61 and 153,465.94

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Solution

The fourth proportional to 280,790.29, 387,491.61 and 153,465.94 is: 211,783.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,790.29 : 387,491.61 = 153,465.94 : x
  2. Step 2: Convert to fraction form
    280,790.29/387,491.61 = 153,465.94/x
  3. Step 3: Cross multiply
    280,790.29x = 387,491.61 × 153,465.94
  4. Step 4: Simplify right side
    280,790.29x = 59,466,764,170.76
  5. Step 5: Solve for x
    x = 59,466,764,170.76/280,790.29
  6. Step 6: Final answer
    x = 211,783.55

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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.