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Finding the Fourth Proportional to 618,121.13, 931,393.69 and 508,262.45

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Solution

The fourth proportional to 618,121.13, 931,393.69 and 508,262.45 is: 765,857.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,121.13 : 931,393.69 = 508,262.45 : x
  2. Step 2: Convert to fraction form
    618,121.13/931,393.69 = 508,262.45/x
  3. Step 3: Cross multiply
    618,121.13x = 931,393.69 × 508,262.45
  4. Step 4: Simplify right side
    618,121.13x = 473,392,432,866.32
  5. Step 5: Solve for x
    x = 473,392,432,866.32/618,121.13
  6. Step 6: Final answer
    x = 765,857.07

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.