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Finding the Fourth Proportional to 610,858.65, 916,068.42 and 211,390.95

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Solution

The fourth proportional to 610,858.65, 916,068.42 and 211,390.95 is: 317,010.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,858.65 : 916,068.42 = 211,390.95 : x
  2. Step 2: Convert to fraction form
    610,858.65/916,068.42 = 211,390.95/x
  3. Step 3: Cross multiply
    610,858.65x = 916,068.42 × 211,390.95
  4. Step 4: Simplify right side
    610,858.65x = 193,648,573,568.80
  5. Step 5: Solve for x
    x = 193,648,573,568.80/610,858.65
  6. Step 6: Final answer
    x = 317,010.45

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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.