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Finding the Fourth Proportional to 280,370.16, 386,903.39 and 257,800.32

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Solution

The fourth proportional to 280,370.16, 386,903.39 and 257,800.32 is: 355,757.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,370.16 : 386,903.39 = 257,800.32 : x
  2. Step 2: Convert to fraction form
    280,370.16/386,903.39 = 257,800.32/x
  3. Step 3: Cross multiply
    280,370.16x = 386,903.39 × 257,800.32
  4. Step 4: Simplify right side
    280,370.16x = 99,743,816,462.08
  5. Step 5: Solve for x
    x = 99,743,816,462.08/280,370.16
  6. Step 6: Final answer
    x = 355,757.60

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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.