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Finding the Fourth Proportional to 1,289,898.96, 1,779,983.88 and 716,919.36

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Solution

The fourth proportional to 1,289,898.96, 1,779,983.88 and 716,919.36 is: 989,306.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289,898.96 : 1,779,983.88 = 716,919.36 : x
  2. Step 2: Convert to fraction form
    1,289,898.96/1,779,983.88 = 716,919.36/x
  3. Step 3: Cross multiply
    1,289,898.96x = 1,779,983.88 × 716,919.36
  4. Step 4: Simplify right side
    1,289,898.96x = 1,276,104,904,059.92
  5. Step 5: Solve for x
    x = 1,276,104,904,059.92/1,289,898.96
  6. Step 6: Final answer
    x = 989,306.10

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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.