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Finding the Fourth Proportional to 555,191.78, 767,455.89 and 495,355.46

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Solution

The fourth proportional to 555,191.78, 767,455.89 and 495,355.46 is: 684,742.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,191.78 : 767,455.89 = 495,355.46 : x
  2. Step 2: Convert to fraction form
    555,191.78/767,455.89 = 495,355.46/x
  3. Step 3: Cross multiply
    555,191.78x = 767,455.89 × 495,355.46
  4. Step 4: Simplify right side
    555,191.78x = 380,163,465,420.66
  5. Step 5: Solve for x
    x = 380,163,465,420.66/555,191.78
  6. Step 6: Final answer
    x = 684,742.60

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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.