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Finding the Fourth Proportional to 660,624.72, 911,405.70 and 467,316.60

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Solution

The fourth proportional to 660,624.72, 911,405.70 and 467,316.60 is: 644,715.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,624.72 : 911,405.70 = 467,316.60 : x
  2. Step 2: Convert to fraction form
    660,624.72/911,405.70 = 467,316.60/x
  3. Step 3: Cross multiply
    660,624.72x = 911,405.70 × 467,316.60
  4. Step 4: Simplify right side
    660,624.72x = 425,915,012,944.62
  5. Step 5: Solve for x
    x = 425,915,012,944.62/660,624.72
  6. Step 6: Final answer
    x = 644,715.52

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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.