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Finding the Fourth Proportional to 280,862.80, 387,590.80 and 153,538.40

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Solution

The fourth proportional to 280,862.80, 387,590.80 and 153,538.40 is: 211,883.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,862.80 : 387,590.80 = 153,538.40 : x
  2. Step 2: Convert to fraction form
    280,862.80/387,590.80 = 153,538.40/x
  3. Step 3: Cross multiply
    280,862.80x = 387,590.80 × 153,538.40
  4. Step 4: Simplify right side
    280,862.80x = 59,510,071,286.72
  5. Step 5: Solve for x
    x = 59,510,071,286.72/280,862.80
  6. Step 6: Final answer
    x = 211,883.07

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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.