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Finding the Fourth Proportional to 480,671.84, 721,111.20 and 143,739.20

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Solution

The fourth proportional to 480,671.84, 721,111.20 and 143,739.20 is: 215,639.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,671.84 : 721,111.20 = 143,739.20 : x
  2. Step 2: Convert to fraction form
    480,671.84/721,111.20 = 143,739.20/x
  3. Step 3: Cross multiply
    480,671.84x = 721,111.20 × 143,739.20
  4. Step 4: Simplify right side
    480,671.84x = 103,651,946,999.04
  5. Step 5: Solve for x
    x = 103,651,946,999.04/480,671.84
  6. Step 6: Final answer
    x = 215,639.73

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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.