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Finding the Fourth Proportional to 644,423.56, 889,210.74 and 357,946.12

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Solution

The fourth proportional to 644,423.56, 889,210.74 and 357,946.12 is: 493,913.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,423.56 : 889,210.74 = 357,946.12 : x
  2. Step 2: Convert to fraction form
    644,423.56/889,210.74 = 357,946.12/x
  3. Step 3: Cross multiply
    644,423.56x = 889,210.74 × 357,946.12
  4. Step 4: Simplify right side
    644,423.56x = 318,289,534,245.33
  5. Step 5: Solve for x
    x = 318,289,534,245.33/644,423.56
  6. Step 6: Final answer
    x = 493,913.56

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Double scale
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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.