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Finding the Fourth Proportional to 521,095.13, 780,631.28 and 384,069.11

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Solution

The fourth proportional to 521,095.13, 780,631.28 and 384,069.11 is: 575,358.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,095.13 : 780,631.28 = 384,069.11 : x
  2. Step 2: Convert to fraction form
    521,095.13/780,631.28 = 384,069.11/x
  3. Step 3: Cross multiply
    521,095.13x = 780,631.28 × 384,069.11
  4. Step 4: Simplify right side
    521,095.13x = 299,816,358,004.78
  5. Step 5: Solve for x
    x = 299,816,358,004.78/521,095.13
  6. Step 6: Final answer
    x = 575,358.20

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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.