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Finding the Fourth Proportional to 645,697.38, 891,074.37 and 359,244.12

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Solution

The fourth proportional to 645,697.38, 891,074.37 and 359,244.12 is: 495,763.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,697.38 : 891,074.37 = 359,244.12 : x
  2. Step 2: Convert to fraction form
    645,697.38/891,074.37 = 359,244.12/x
  3. Step 3: Cross multiply
    645,697.38x = 891,074.37 × 359,244.12
  4. Step 4: Simplify right side
    645,697.38x = 320,113,227,905.20
  5. Step 5: Solve for x
    x = 320,113,227,905.20/645,697.38
  6. Step 6: Final answer
    x = 495,763.55

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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.