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Finding the Fourth Proportional to 402,358.76, 555,265.06 and 221,082.42

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Solution

The fourth proportional to 402,358.76, 555,265.06 and 221,082.42 is: 305,099.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,358.76 : 555,265.06 = 221,082.42 : x
  2. Step 2: Convert to fraction form
    402,358.76/555,265.06 = 221,082.42/x
  3. Step 3: Cross multiply
    402,358.76x = 555,265.06 × 221,082.42
  4. Step 4: Simplify right side
    402,358.76x = 122,759,343,206.25
  5. Step 5: Solve for x
    x = 122,759,343,206.25/402,358.76
  6. Step 6: Final answer
    x = 305,099.22

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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.