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Finding the Fourth Proportional to 402,484.69, 555,401.94 and 221,192.71

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Solution

The fourth proportional to 402,484.69, 555,401.94 and 221,192.71 is: 305,231.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,484.69 : 555,401.94 = 221,192.71 : x
  2. Step 2: Convert to fraction form
    402,484.69/555,401.94 = 221,192.71/x
  3. Step 3: Cross multiply
    402,484.69x = 555,401.94 × 221,192.71
  4. Step 4: Simplify right side
    402,484.69x = 122,850,860,247.86
  5. Step 5: Solve for x
    x = 122,850,860,247.86/402,484.69
  6. Step 6: Final answer
    x = 305,231.14

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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.