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Finding the Fourth Proportional to 432,118.40, 647,626.80 and 242,578.40

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Solution

The fourth proportional to 432,118.40, 647,626.80 and 242,578.40 is: 363,558.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    432,118.40 : 647,626.80 = 242,578.40 : x
  2. Step 2: Convert to fraction form
    432,118.40/647,626.80 = 242,578.40/x
  3. Step 3: Cross multiply
    432,118.40x = 647,626.80 × 242,578.40
  4. Step 4: Simplify right side
    432,118.40x = 157,100,272,941.12
  5. Step 5: Solve for x
    x = 157,100,272,941.12/432,118.40
  6. Step 6: Final answer
    x = 363,558.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.