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Finding the Fourth Proportional to 677,915.36, 935,505.40 and 371,990.80

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Solution

The fourth proportional to 677,915.36, 935,505.40 and 371,990.80 is: 513,337.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,915.36 : 935,505.40 = 371,990.80 : x
  2. Step 2: Convert to fraction form
    677,915.36/935,505.40 = 371,990.80/x
  3. Step 3: Cross multiply
    677,915.36x = 935,505.40 × 371,990.80
  4. Step 4: Simplify right side
    677,915.36x = 347,999,402,150.32
  5. Step 5: Solve for x
    x = 347,999,402,150.32/677,915.36
  6. Step 6: Final answer
    x = 513,337.54

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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.