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Finding the Fourth Proportional to 660,511.91, 911,506.57 and 402,388.85

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Solution

The fourth proportional to 660,511.91, 911,506.57 and 402,388.85 is: 555,296.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,511.91 : 911,506.57 = 402,388.85 : x
  2. Step 2: Convert to fraction form
    660,511.91/911,506.57 = 402,388.85/x
  3. Step 3: Cross multiply
    660,511.91x = 911,506.57 × 402,388.85
  4. Step 4: Simplify right side
    660,511.91x = 366,780,076,615.31
  5. Step 5: Solve for x
    x = 366,780,076,615.31/660,511.91
  6. Step 6: Final answer
    x = 555,296.69

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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.