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Finding the Fourth Proportional to 610,439.32, 915,363.51 and 210,939.94

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Solution

The fourth proportional to 610,439.32, 915,363.51 and 210,939.94 is: 316,307.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,439.32 : 915,363.51 = 210,939.94 : x
  2. Step 2: Convert to fraction form
    610,439.32/915,363.51 = 210,939.94/x
  3. Step 3: Cross multiply
    610,439.32x = 915,363.51 × 210,939.94
  4. Step 4: Simplify right side
    610,439.32x = 193,086,723,877.59
  5. Step 5: Solve for x
    x = 193,086,723,877.59/610,439.32
  6. Step 6: Final answer
    x = 316,307.81

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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.