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Finding the Fourth Proportional to 615,721.02, 923,720.04 and 216,389.40

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Solution

The fourth proportional to 615,721.02, 923,720.04 and 216,389.40 is: 324,632.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,721.02 : 923,720.04 = 216,389.40 : x
  2. Step 2: Convert to fraction form
    615,721.02/923,720.04 = 216,389.40/x
  3. Step 3: Cross multiply
    615,721.02x = 923,720.04 × 216,389.40
  4. Step 4: Simplify right side
    615,721.02x = 199,883,225,223.58
  5. Step 5: Solve for x
    x = 199,883,225,223.58/615,721.02
  6. Step 6: Final answer
    x = 324,632.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.