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Finding the Fourth Proportional to 610,548.79, 915,962.70 and 211,189.21

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Solution

The fourth proportional to 610,548.79, 915,962.70 and 211,189.21 is: 316,832.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,548.79 : 915,962.70 = 211,189.21 : x
  2. Step 2: Convert to fraction form
    610,548.79/915,962.70 = 211,189.21/x
  3. Step 3: Cross multiply
    610,548.79x = 915,962.70 × 211,189.21
  4. Step 4: Simplify right side
    610,548.79x = 193,441,439,002.47
  5. Step 5: Solve for x
    x = 193,441,439,002.47/610,548.79
  6. Step 6: Final answer
    x = 316,832.07

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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.