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Finding the Fourth Proportional to 661,564.88, 912,942.96 and 385,975.52

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Solution

The fourth proportional to 661,564.88, 912,942.96 and 385,975.52 is: 532,636.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,564.88 : 912,942.96 = 385,975.52 : x
  2. Step 2: Convert to fraction form
    661,564.88/912,942.96 = 385,975.52/x
  3. Step 3: Cross multiply
    661,564.88x = 912,942.96 × 385,975.52
  4. Step 4: Simplify right side
    661,564.88x = 352,373,633,716.34
  5. Step 5: Solve for x
    x = 352,373,633,716.34/661,564.88
  6. Step 6: Final answer
    x = 532,636.55

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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.