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Finding the Fourth Proportional to 402,649.40, 555,656.52 and 221,364.41

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Solution

The fourth proportional to 402,649.40, 555,656.52 and 221,364.41 is: 305,483.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,649.40 : 555,656.52 = 221,364.41 : x
  2. Step 2: Convert to fraction form
    402,649.40/555,656.52 = 221,364.41/x
  3. Step 3: Cross multiply
    402,649.40x = 555,656.52 × 221,364.41
  4. Step 4: Simplify right side
    402,649.40x = 123,002,577,712.45
  5. Step 5: Solve for x
    x = 123,002,577,712.45/402,649.40
  6. Step 6: Final answer
    x = 305,483.08

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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.