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Finding the Fourth Proportional to 642,125.93, 886,029.65 and 384,109.49

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Solution

The fourth proportional to 642,125.93, 886,029.65 and 384,109.49 is: 530,008.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,125.93 : 886,029.65 = 384,109.49 : x
  2. Step 2: Convert to fraction form
    642,125.93/886,029.65 = 384,109.49/x
  3. Step 3: Cross multiply
    642,125.93x = 886,029.65 × 384,109.49
  4. Step 4: Simplify right side
    642,125.93x = 340,332,395,398.71
  5. Step 5: Solve for x
    x = 340,332,395,398.71/642,125.93
  6. Step 6: Final answer
    x = 530,008.81

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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.