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Finding the Fourth Proportional to 402,606.37, 555,598.58 and 221,329.95

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Solution

The fourth proportional to 402,606.37, 555,598.58 and 221,329.95 is: 305,436.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,606.37 : 555,598.58 = 221,329.95 : x
  2. Step 2: Convert to fraction form
    402,606.37/555,598.58 = 221,329.95/x
  3. Step 3: Cross multiply
    402,606.37x = 555,598.58 × 221,329.95
  4. Step 4: Simplify right side
    402,606.37x = 122,970,605,931.47
  5. Step 5: Solve for x
    x = 122,970,605,931.47/402,606.37
  6. Step 6: Final answer
    x = 305,436.31

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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.