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Finding the Fourth Proportional to 280,371.16, 386,904.76 and 257,801.32

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Solution

The fourth proportional to 280,371.16, 386,904.76 and 257,801.32 is: 355,758.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,371.16 : 386,904.76 = 257,801.32 : x
  2. Step 2: Convert to fraction form
    280,371.16/386,904.76 = 257,801.32/x
  3. Step 3: Cross multiply
    280,371.16x = 386,904.76 × 257,801.32
  4. Step 4: Simplify right side
    280,371.16x = 99,744,557,842.28
  5. Step 5: Solve for x
    x = 99,744,557,842.28/280,371.16
  6. Step 6: Final answer
    x = 355,758.98

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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.