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Finding the Fourth Proportional to 611,482.46, 917,386.34 and 212,122.60

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Solution

The fourth proportional to 611,482.46, 917,386.34 and 212,122.60 is: 318,240.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,482.46 : 917,386.34 = 212,122.60 : x
  2. Step 2: Convert to fraction form
    611,482.46/917,386.34 = 212,122.60/x
  3. Step 3: Cross multiply
    611,482.46x = 917,386.34 × 212,122.60
  4. Step 4: Simplify right side
    611,482.46x = 194,598,375,645.28
  5. Step 5: Solve for x
    x = 194,598,375,645.28/611,482.46
  6. Step 6: Final answer
    x = 318,240.32

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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.