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Finding the Fourth Proportional to 384,920.80, 576,214.80 and 290,831.20

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Solution

The fourth proportional to 384,920.80, 576,214.80 and 290,831.20 is: 435,365.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,920.80 : 576,214.80 = 290,831.20 : x
  2. Step 2: Convert to fraction form
    384,920.80/576,214.80 = 290,831.20/x
  3. Step 3: Cross multiply
    384,920.80x = 576,214.80 × 290,831.20
  4. Step 4: Simplify right side
    384,920.80x = 167,581,241,741.76
  5. Step 5: Solve for x
    x = 167,581,241,741.76/384,920.80
  6. Step 6: Final answer
    x = 435,365.51

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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.