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Finding the Fourth Proportional to 632,393.88, 872,685 and 345,907.77

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Solution

The fourth proportional to 632,393.88, 872,685 and 345,907.77 is: 477,342.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    632,393.88 : 872,685 = 345,907.77 : x
  2. Step 2: Convert to fraction form
    632,393.88/872,685 = 345,907.77/x
  3. Step 3: Cross multiply
    632,393.88x = 872,685 × 345,907.77
  4. Step 4: Simplify right side
    632,393.88x = 301,868,522,262.45
  5. Step 5: Solve for x
    x = 301,868,522,262.45/632,393.88
  6. Step 6: Final answer
    x = 477,342.57

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Half scale
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Double scale
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Similar ratio
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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.