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Finding the Fourth Proportional to 390,332.81, 538,652.27 and 220,563.29

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Solution

The fourth proportional to 390,332.81, 538,652.27 and 220,563.29 is: 304,373.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,332.81 : 538,652.27 = 220,563.29 : x
  2. Step 2: Convert to fraction form
    390,332.81/538,652.27 = 220,563.29/x
  3. Step 3: Cross multiply
    390,332.81x = 538,652.27 × 220,563.29
  4. Step 4: Simplify right side
    390,332.81x = 118,806,916,837.17
  5. Step 5: Solve for x
    x = 118,806,916,837.17/390,332.81
  6. Step 6: Final answer
    x = 304,373.38

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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.