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Finding the Fourth Proportional to 665,701.89, 918,672.81 and 359,777.55

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Solution

The fourth proportional to 665,701.89, 918,672.81 and 359,777.55 is: 496,495.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,701.89 : 918,672.81 = 359,777.55 : x
  2. Step 2: Convert to fraction form
    665,701.89/918,672.81 = 359,777.55/x
  3. Step 3: Cross multiply
    665,701.89x = 918,672.81 × 359,777.55
  4. Step 4: Simplify right side
    665,701.89x = 330,517,852,833.42
  5. Step 5: Solve for x
    x = 330,517,852,833.42/665,701.89
  6. Step 6: Final answer
    x = 496,495.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.