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Finding the Fourth Proportional to 389,039.96, 536,864.46 and 216,963.16

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Solution

The fourth proportional to 389,039.96, 536,864.46 and 216,963.16 is: 299,403.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,039.96 : 536,864.46 = 216,963.16 : x
  2. Step 2: Convert to fraction form
    389,039.96/536,864.46 = 216,963.16/x
  3. Step 3: Cross multiply
    389,039.96x = 536,864.46 × 216,963.16
  4. Step 4: Simplify right side
    389,039.96x = 116,479,807,577.52
  5. Step 5: Solve for x
    x = 116,479,807,577.52/389,039.96
  6. Step 6: Final answer
    x = 299,403.19

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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.