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Finding the Fourth Proportional to 646,255.50, 891,853.11 and 404,460.78

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Solution

The fourth proportional to 646,255.50, 891,853.11 and 404,460.78 is: 558,168.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,255.50 : 891,853.11 = 404,460.78 : x
  2. Step 2: Convert to fraction form
    646,255.50/891,853.11 = 404,460.78/x
  3. Step 3: Cross multiply
    646,255.50x = 891,853.11 × 404,460.78
  4. Step 4: Simplify right side
    646,255.50x = 360,719,604,516.03
  5. Step 5: Solve for x
    x = 360,719,604,516.03/646,255.50
  6. Step 6: Final answer
    x = 558,168.72

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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.