Home / 645,736.54-891,116.30-359,256.56

Finding the Fourth Proportional to 645,736.54, 891,116.30 and 359,256.56

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Solution

The fourth proportional to 645,736.54, 891,116.30 and 359,256.56 is: 495,773.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,736.54 : 891,116.30 = 359,256.56 : x
  2. Step 2: Convert to fraction form
    645,736.54/891,116.30 = 359,256.56/x
  3. Step 3: Cross multiply
    645,736.54x = 891,116.30 × 359,256.56
  4. Step 4: Simplify right side
    645,736.54x = 320,139,376,497.93
  5. Step 5: Solve for x
    x = 320,139,376,497.93/645,736.54
  6. Step 6: Final answer
    x = 495,773.98

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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.