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Finding the Fourth Proportional to 480,083.72, 661,787.70 and 318,653.96

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Solution

The fourth proportional to 480,083.72, 661,787.70 and 318,653.96 is: 439,259.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,083.72 : 661,787.70 = 318,653.96 : x
  2. Step 2: Convert to fraction form
    480,083.72/661,787.70 = 318,653.96/x
  3. Step 3: Cross multiply
    480,083.72x = 661,787.70 × 318,653.96
  4. Step 4: Simplify right side
    480,083.72x = 210,881,271,284.29
  5. Step 5: Solve for x
    x = 210,881,271,284.29/480,083.72
  6. Step 6: Final answer
    x = 439,259.37

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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.