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Finding the Fourth Proportional to 867,732.86, 1,197,462.21 and 485,762.78

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Solution

The fourth proportional to 867,732.86, 1,197,462.21 and 485,762.78 is: 670,347.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    867,732.86 : 1,197,462.21 = 485,762.78 : x
  2. Step 2: Convert to fraction form
    867,732.86/1,197,462.21 = 485,762.78/x
  3. Step 3: Cross multiply
    867,732.86x = 1,197,462.21 × 485,762.78
  4. Step 4: Simplify right side
    867,732.86x = 581,682,572,074.54
  5. Step 5: Solve for x
    x = 581,682,572,074.54/867,732.86
  6. Step 6: Final answer
    x = 670,347.52

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1.5x scale

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.