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Finding the Fourth Proportional to 658,611.48, 908,878.14 and 356,804.76

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Solution

The fourth proportional to 658,611.48, 908,878.14 and 356,804.76 is: 492,387.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,611.48 : 908,878.14 = 356,804.76 : x
  2. Step 2: Convert to fraction form
    658,611.48/908,878.14 = 356,804.76/x
  3. Step 3: Cross multiply
    658,611.48x = 908,878.14 × 356,804.76
  4. Step 4: Simplify right side
    658,611.48x = 324,292,046,611.95
  5. Step 5: Solve for x
    x = 324,292,046,611.95/658,611.48
  6. Step 6: Final answer
    x = 492,387.48

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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.