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Finding the Fourth Proportional to 386,637.48, 533,553.20 and 216,867.96

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Solution

The fourth proportional to 386,637.48, 533,553.20 and 216,867.96 is: 299,274.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,637.48 : 533,553.20 = 216,867.96 : x
  2. Step 2: Convert to fraction form
    386,637.48/533,553.20 = 216,867.96/x
  3. Step 3: Cross multiply
    386,637.48x = 533,553.20 × 216,867.96
  4. Step 4: Simplify right side
    386,637.48x = 115,710,594,035.47
  5. Step 5: Solve for x
    x = 115,710,594,035.47/386,637.48
  6. Step 6: Final answer
    x = 299,274.13

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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.