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Finding the Fourth Proportional to 768,417.54, 1,060,373.07 and 428,907.66

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Solution

The fourth proportional to 768,417.54, 1,060,373.07 and 428,907.66 is: 591,868.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,417.54 : 1,060,373.07 = 428,907.66 : x
  2. Step 2: Convert to fraction form
    768,417.54/1,060,373.07 = 428,907.66/x
  3. Step 3: Cross multiply
    768,417.54x = 1,060,373.07 × 428,907.66
  4. Step 4: Simplify right side
    768,417.54x = 454,802,132,180.72
  5. Step 5: Solve for x
    x = 454,802,132,180.72/768,417.54
  6. Step 6: Final answer
    x = 591,868.49

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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.