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Finding the Fourth Proportional to 800,491.37, 1,105,006.74 and 542,721.37

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Solution

The fourth proportional to 800,491.37, 1,105,006.74 and 542,721.37 is: 749,178.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    800,491.37 : 1,105,006.74 = 542,721.37 : x
  2. Step 2: Convert to fraction form
    800,491.37/1,105,006.74 = 542,721.37/x
  3. Step 3: Cross multiply
    800,491.37x = 1,105,006.74 × 542,721.37
  4. Step 4: Simplify right side
    800,491.37x = 599,710,771,792.03
  5. Step 5: Solve for x
    x = 599,710,771,792.03/800,491.37
  6. Step 6: Final answer
    x = 749,178.31

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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.