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Finding the Fourth Proportional to 623,644.70, 935,904.45 and 399,550.10

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Solution

The fourth proportional to 623,644.70, 935,904.45 and 399,550.10 is: 599,605.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,644.70 : 935,904.45 = 399,550.10 : x
  2. Step 2: Convert to fraction form
    623,644.70/935,904.45 = 399,550.10/x
  3. Step 3: Cross multiply
    623,644.70x = 935,904.45 × 399,550.10
  4. Step 4: Simplify right side
    623,644.70x = 373,940,716,587.95
  5. Step 5: Solve for x
    x = 373,940,716,587.95/623,644.70
  6. Step 6: Final answer
    x = 599,605.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.