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Finding the Fourth Proportional to 660,511.42, 911,505.71 and 374,086.87

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Solution

The fourth proportional to 660,511.42, 911,505.71 and 374,086.87 is: 516,239.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,511.42 : 911,505.71 = 374,086.87 : x
  2. Step 2: Convert to fraction form
    660,511.42/911,505.71 = 374,086.87/x
  3. Step 3: Cross multiply
    660,511.42x = 911,505.71 × 374,086.87
  4. Step 4: Simplify right side
    660,511.42x = 340,982,316,697.48
  5. Step 5: Solve for x
    x = 340,982,316,697.48/660,511.42
  6. Step 6: Final answer
    x = 516,239.85

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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.