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Finding the Fourth Proportional to 661,014.72, 912,200.40 and 359,208

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Solution

The fourth proportional to 661,014.72, 912,200.40 and 359,208 is: 495,707.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,014.72 : 912,200.40 = 359,208 : x
  2. Step 2: Convert to fraction form
    661,014.72/912,200.40 = 359,208/x
  3. Step 3: Cross multiply
    661,014.72x = 912,200.40 × 359,208
  4. Step 4: Simplify right side
    661,014.72x = 327,669,681,283.20
  5. Step 5: Solve for x
    x = 327,669,681,283.20/661,014.72
  6. Step 6: Final answer
    x = 495,707.09

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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.