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Finding the Fourth Proportional to 660,576.90, 911,565.66 and 374,099.07

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Solution

The fourth proportional to 660,576.90, 911,565.66 and 374,099.07 is: 516,239.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,576.90 : 911,565.66 = 374,099.07 : x
  2. Step 2: Convert to fraction form
    660,576.90/911,565.66 = 374,099.07/x
  3. Step 3: Cross multiply
    660,576.90x = 911,565.66 × 374,099.07
  4. Step 4: Simplify right side
    660,576.90x = 341,015,865,649.94
  5. Step 5: Solve for x
    x = 341,015,865,649.94/660,576.90
  6. Step 6: Final answer
    x = 516,239.47

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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.