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Finding the Fourth Proportional to 768,237.70, 1,060,062.09 and 428,640.10

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Solution

The fourth proportional to 768,237.70, 1,060,062.09 and 428,640.10 is: 591,464.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,237.70 : 1,060,062.09 = 428,640.10 : x
  2. Step 2: Convert to fraction form
    768,237.70/1,060,062.09 = 428,640.10/x
  3. Step 3: Cross multiply
    768,237.70x = 1,060,062.09 × 428,640.10
  4. Step 4: Simplify right side
    768,237.70x = 454,385,120,263.81
  5. Step 5: Solve for x
    x = 454,385,120,263.81/768,237.70
  6. Step 6: Final answer
    x = 591,464.23

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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.