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Finding the Fourth Proportional to 611,718.13, 917,586.42 and 212,371.60

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Solution

The fourth proportional to 611,718.13, 917,586.42 and 212,371.60 is: 318,560.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,718.13 : 917,586.42 = 212,371.60 : x
  2. Step 2: Convert to fraction form
    611,718.13/917,586.42 = 212,371.60/x
  3. Step 3: Cross multiply
    611,718.13x = 917,586.42 × 212,371.60
  4. Step 4: Simplify right side
    611,718.13x = 194,869,296,153.67
  5. Step 5: Solve for x
    x = 194,869,296,153.67/611,718.13
  6. Step 6: Final answer
    x = 318,560.60

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1.5x scale

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.