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Finding the Fourth Proportional to 485,655.45, 728,483.18 and 485,655.45

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Solution

The fourth proportional to 485,655.45, 728,483.18 and 485,655.45 is: 728,483.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,655.45 : 728,483.18 = 485,655.45 : x
  2. Step 2: Convert to fraction form
    485,655.45/728,483.18 = 485,655.45/x
  3. Step 3: Cross multiply
    485,655.45x = 728,483.18 × 485,655.45
  4. Step 4: Simplify right side
    485,655.45x = 353,791,824,172.05
  5. Step 5: Solve for x
    x = 353,791,824,172.05/485,655.45
  6. Step 6: Final answer
    x = 728,483.18

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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.