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Finding the Fourth Proportional to 402,990.59, 604,464.02 and 122,485.97

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Solution

The fourth proportional to 402,990.59, 604,464.02 and 122,485.97 is: 183,722.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,990.59 : 604,464.02 = 122,485.97 : x
  2. Step 2: Convert to fraction form
    402,990.59/604,464.02 = 122,485.97/x
  3. Step 3: Cross multiply
    402,990.59x = 604,464.02 × 122,485.97
  4. Step 4: Simplify right side
    402,990.59x = 74,038,358,185.05
  5. Step 5: Solve for x
    x = 74,038,358,185.05/402,990.59
  6. Step 6: Final answer
    x = 183,722.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.