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Finding the Fourth Proportional to 509,700.96, 703,405.39 and 280,275.70

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Solution

The fourth proportional to 509,700.96, 703,405.39 and 280,275.70 is: 386,790.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,700.96 : 703,405.39 = 280,275.70 : x
  2. Step 2: Convert to fraction form
    509,700.96/703,405.39 = 280,275.70/x
  3. Step 3: Cross multiply
    509,700.96x = 703,405.39 × 280,275.70
  4. Step 4: Simplify right side
    509,700.96x = 197,147,438,066.02
  5. Step 5: Solve for x
    x = 197,147,438,066.02/509,700.96
  6. Step 6: Final answer
    x = 386,790.40

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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.