Home / 699,045.90-964,674.12-393,122.20

Finding the Fourth Proportional to 699,045.90, 964,674.12 and 393,122.20

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Solution

The fourth proportional to 699,045.90, 964,674.12 and 393,122.20 is: 542,503.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,045.90 : 964,674.12 = 393,122.20 : x
  2. Step 2: Convert to fraction form
    699,045.90/964,674.12 = 393,122.20/x
  3. Step 3: Cross multiply
    699,045.90x = 964,674.12 × 393,122.20
  4. Step 4: Simplify right side
    699,045.90x = 379,234,812,337.46
  5. Step 5: Solve for x
    x = 379,234,812,337.46/699,045.90
  6. Step 6: Final answer
    x = 542,503.45

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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.