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Finding the Fourth Proportional to 571,640.20, 788,806.62 and 330,000.60

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Solution

The fourth proportional to 571,640.20, 788,806.62 and 330,000.60 is: 455,368.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,640.20 : 788,806.62 = 330,000.60 : x
  2. Step 2: Convert to fraction form
    571,640.20/788,806.62 = 330,000.60/x
  3. Step 3: Cross multiply
    571,640.20x = 788,806.62 × 330,000.60
  4. Step 4: Simplify right side
    571,640.20x = 260,306,657,883.97
  5. Step 5: Solve for x
    x = 260,306,657,883.97/571,640.20
  6. Step 6: Final answer
    x = 455,368.01

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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.