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Finding the Fourth Proportional to 402,606.87, 555,599.28 and 221,330.45

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Solution

The fourth proportional to 402,606.87, 555,599.28 and 221,330.45 is: 305,437.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,606.87 : 555,599.28 = 221,330.45 : x
  2. Step 2: Convert to fraction form
    402,606.87/555,599.28 = 221,330.45/x
  3. Step 3: Cross multiply
    402,606.87x = 555,599.28 × 221,330.45
  4. Step 4: Simplify right side
    402,606.87x = 122,971,035,884.08
  5. Step 5: Solve for x
    x = 122,971,035,884.08/402,606.87
  6. Step 6: Final answer
    x = 305,437.00

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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.