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Finding the Fourth Proportional to 280,638.95, 387,409.43 and 178,804.04

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Solution

The fourth proportional to 280,638.95, 387,409.43 and 178,804.04 is: 246,830.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,638.95 : 387,409.43 = 178,804.04 : x
  2. Step 2: Convert to fraction form
    280,638.95/387,409.43 = 178,804.04/x
  3. Step 3: Cross multiply
    280,638.95x = 387,409.43 × 178,804.04
  4. Step 4: Simplify right side
    280,638.95x = 69,270,370,324.08
  5. Step 5: Solve for x
    x = 69,270,370,324.08/280,638.95
  6. Step 6: Final answer
    x = 246,830.92

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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.