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Finding the Fourth Proportional to 678,915.12, 936,932.52 and 377,109.12

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Solution

The fourth proportional to 678,915.12, 936,932.52 and 377,109.12 is: 520,427.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,915.12 : 936,932.52 = 377,109.12 : x
  2. Step 2: Convert to fraction form
    678,915.12/936,932.52 = 377,109.12/x
  3. Step 3: Cross multiply
    678,915.12x = 936,932.52 × 377,109.12
  4. Step 4: Simplify right side
    678,915.12x = 353,325,798,116.58
  5. Step 5: Solve for x
    x = 353,325,798,116.58/678,915.12
  6. Step 6: Final answer
    x = 520,427.06

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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.