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Finding the Fourth Proportional to 1,398,601.91, 1,929,889.04 and 786,733.98

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Solution

The fourth proportional to 1,398,601.91, 1,929,889.04 and 786,733.98 is: 1,085,590.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398,601.91 : 1,929,889.04 = 786,733.98 : x
  2. Step 2: Convert to fraction form
    1,398,601.91/1,929,889.04 = 786,733.98/x
  3. Step 3: Cross multiply
    1,398,601.91x = 1,929,889.04 × 786,733.98
  4. Step 4: Simplify right side
    1,398,601.91x = 1,518,309,281,463.91
  5. Step 5: Solve for x
    x = 1,518,309,281,463.91/1,398,601.91
  6. Step 6: Final answer
    x = 1,085,590.74

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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.