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Finding the Fourth Proportional to 520,681.01, 780,213.69 and 361,068.28

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Solution

The fourth proportional to 520,681.01, 780,213.69 and 361,068.28 is: 541,042.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,681.01 : 780,213.69 = 361,068.28 : x
  2. Step 2: Convert to fraction form
    520,681.01/780,213.69 = 361,068.28/x
  3. Step 3: Cross multiply
    520,681.01x = 780,213.69 × 361,068.28
  4. Step 4: Simplify right side
    520,681.01x = 281,710,415,080.75
  5. Step 5: Solve for x
    x = 281,710,415,080.75/520,681.01
  6. Step 6: Final answer
    x = 541,042.23

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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.