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Finding the Fourth Proportional to 521,703.60, 783,073.80 and 255,764.40

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Solution

The fourth proportional to 521,703.60, 783,073.80 and 255,764.40 is: 383,900.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,703.60 : 783,073.80 = 255,764.40 : x
  2. Step 2: Convert to fraction form
    521,703.60/783,073.80 = 255,764.40/x
  3. Step 3: Cross multiply
    521,703.60x = 783,073.80 × 255,764.40
  4. Step 4: Simplify right side
    521,703.60x = 200,282,400,612.72
  5. Step 5: Solve for x
    x = 200,282,400,612.72/521,703.60
  6. Step 6: Final answer
    x = 383,900.74

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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.