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Finding the Fourth Proportional to 521,987.10, 782,980.65 and 452,003.10

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Solution

The fourth proportional to 521,987.10, 782,980.65 and 452,003.10 is: 678,004.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,987.10 : 782,980.65 = 452,003.10 : x
  2. Step 2: Convert to fraction form
    521,987.10/782,980.65 = 452,003.10/x
  3. Step 3: Cross multiply
    521,987.10x = 782,980.65 × 452,003.10
  4. Step 4: Simplify right side
    521,987.10x = 353,909,681,040.02
  5. Step 5: Solve for x
    x = 353,909,681,040.02/521,987.10
  6. Step 6: Final answer
    x = 678,004.65

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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.