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Finding the Fourth Proportional to 555,539.70, 766,774.28 and 394,445.28

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Solution

The fourth proportional to 555,539.70, 766,774.28 and 394,445.28 is: 544,426.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,539.70 : 766,774.28 = 394,445.28 : x
  2. Step 2: Convert to fraction form
    555,539.70/766,774.28 = 394,445.28/x
  3. Step 3: Cross multiply
    555,539.70x = 766,774.28 × 394,445.28
  4. Step 4: Simplify right side
    555,539.70x = 302,450,495,571.40
  5. Step 5: Solve for x
    x = 302,450,495,571.40/555,539.70
  6. Step 6: Final answer
    x = 544,426.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.