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Finding the Fourth Proportional to 521,987.60, 782,981.40 and 452,003.60

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Solution

The fourth proportional to 521,987.60, 782,981.40 and 452,003.60 is: 678,005.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,987.60 : 782,981.40 = 452,003.60 : x
  2. Step 2: Convert to fraction form
    521,987.60/782,981.40 = 452,003.60/x
  3. Step 3: Cross multiply
    521,987.60x = 782,981.40 × 452,003.60
  4. Step 4: Simplify right side
    521,987.60x = 353,910,411,533.04
  5. Step 5: Solve for x
    x = 353,910,411,533.04/521,987.60
  6. Step 6: Final answer
    x = 678,005.40

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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.