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Finding the Fourth Proportional to 522,407.55, 785,281.73 and 485,428.35

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Solution

The fourth proportional to 522,407.55, 785,281.73 and 485,428.35 is: 729,694.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,407.55 : 785,281.73 = 485,428.35 : x
  2. Step 2: Convert to fraction form
    522,407.55/785,281.73 = 485,428.35/x
  3. Step 3: Cross multiply
    522,407.55x = 785,281.73 × 485,428.35
  4. Step 4: Simplify right side
    522,407.55x = 381,198,014,479.05
  5. Step 5: Solve for x
    x = 381,198,014,479.05/522,407.55
  6. Step 6: Final answer
    x = 729,694.69

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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.