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Finding the Fourth Proportional to 666,760.96, 920,155.52 and 380,327.68

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Solution

The fourth proportional to 666,760.96, 920,155.52 and 380,327.68 is: 524,866.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,760.96 : 920,155.52 = 380,327.68 : x
  2. Step 2: Convert to fraction form
    666,760.96/920,155.52 = 380,327.68/x
  3. Step 3: Cross multiply
    666,760.96x = 920,155.52 × 380,327.68
  4. Step 4: Simplify right side
    666,760.96x = 349,960,614,160.79
  5. Step 5: Solve for x
    x = 349,960,614,160.79/666,760.96
  6. Step 6: Final answer
    x = 524,866.68

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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.