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Finding the Fourth Proportional to 481,721.60, 721,804.80 and 402,406.40

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Solution

The fourth proportional to 481,721.60, 721,804.80 and 402,406.40 is: 602,960.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,721.60 : 721,804.80 = 402,406.40 : x
  2. Step 2: Convert to fraction form
    481,721.60/721,804.80 = 402,406.40/x
  3. Step 3: Cross multiply
    481,721.60x = 721,804.80 × 402,406.40
  4. Step 4: Simplify right side
    481,721.60x = 290,458,871,070.72
  5. Step 5: Solve for x
    x = 290,458,871,070.72/481,721.60
  6. Step 6: Final answer
    x = 602,960.03

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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.