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Finding the Fourth Proportional to 485,302, 669,637.92 and 281,313.12

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Solution

The fourth proportional to 485,302, 669,637.92 and 281,313.12 is: 388,166.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,302 : 669,637.92 = 281,313.12 : x
  2. Step 2: Convert to fraction form
    485,302/669,637.92 = 281,313.12/x
  3. Step 3: Cross multiply
    485,302x = 669,637.92 × 281,313.12
  4. Step 4: Simplify right side
    485,302x = 188,377,932,545.51
  5. Step 5: Solve for x
    x = 188,377,932,545.51/485,302
  6. Step 6: Final answer
    x = 388,166.40

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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.