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Finding the Fourth Proportional to 660,356.44, 911,680.82 and 402,330.76

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Solution

The fourth proportional to 660,356.44, 911,680.82 and 402,330.76 is: 555,453.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,356.44 : 911,680.82 = 402,330.76 : x
  2. Step 2: Convert to fraction form
    660,356.44/911,680.82 = 402,330.76/x
  3. Step 3: Cross multiply
    660,356.44x = 911,680.82 × 402,330.76
  4. Step 4: Simplify right side
    660,356.44x = 366,797,237,188.02
  5. Step 5: Solve for x
    x = 366,797,237,188.02/660,356.44
  6. Step 6: Final answer
    x = 555,453.41

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Half scale
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Double scale
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Similar ratio
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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.