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Finding the Fourth Proportional to 521,009.69, 780,253.19 and 360,636.27

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Solution

The fourth proportional to 521,009.69, 780,253.19 and 360,636.27 is: 540,081.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,009.69 : 780,253.19 = 360,636.27 : x
  2. Step 2: Convert to fraction form
    521,009.69/780,253.19 = 360,636.27/x
  3. Step 3: Cross multiply
    521,009.69x = 780,253.19 × 360,636.27
  4. Step 4: Simplify right side
    521,009.69x = 281,387,596,720.46
  5. Step 5: Solve for x
    x = 281,387,596,720.46/521,009.69
  6. Step 6: Final answer
    x = 540,081.32

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1.5x scale

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.