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Finding the Fourth Proportional to 719,886.94, 993,424.98 and 397,590.10

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Solution

The fourth proportional to 719,886.94, 993,424.98 and 397,590.10 is: 548,663.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,886.94 : 993,424.98 = 397,590.10 : x
  2. Step 2: Convert to fraction form
    719,886.94/993,424.98 = 397,590.10/x
  3. Step 3: Cross multiply
    719,886.94x = 993,424.98 × 397,590.10
  4. Step 4: Simplify right side
    719,886.94x = 394,975,937,140.70
  5. Step 5: Solve for x
    x = 394,975,937,140.70/719,886.94
  6. Step 6: Final answer
    x = 548,663.85

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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.