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Finding the Fourth Proportional to 402,700.03, 555,711.10 and 221,401.15

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Solution

The fourth proportional to 402,700.03, 555,711.10 and 221,401.15 is: 305,525.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,700.03 : 555,711.10 = 221,401.15 : x
  2. Step 2: Convert to fraction form
    402,700.03/555,711.10 = 221,401.15/x
  3. Step 3: Cross multiply
    402,700.03x = 555,711.10 × 221,401.15
  4. Step 4: Simplify right side
    402,700.03x = 123,035,074,664.98
  5. Step 5: Solve for x
    x = 123,035,074,664.98/402,700.03
  6. Step 6: Final answer
    x = 305,525.37

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Half scale
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Double scale
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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.