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Finding the Fourth Proportional to 645,777.08, 891,214.96 and 359,297.76

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Solution

The fourth proportional to 645,777.08, 891,214.96 and 359,297.76 is: 495,854.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,777.08 : 891,214.96 = 359,297.76 : x
  2. Step 2: Convert to fraction form
    645,777.08/891,214.96 = 359,297.76/x
  3. Step 3: Cross multiply
    645,777.08x = 891,214.96 × 359,297.76
  4. Step 4: Simplify right side
    645,777.08x = 320,211,538,806.49
  5. Step 5: Solve for x
    x = 320,211,538,806.49/645,777.08
  6. Step 6: Final answer
    x = 495,854.60

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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.