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Finding the Fourth Proportional to 621,494.26, 930,746.03 and 421,206.98

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Solution

The fourth proportional to 621,494.26, 930,746.03 and 421,206.98 is: 630,797.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,494.26 : 930,746.03 = 421,206.98 : x
  2. Step 2: Convert to fraction form
    621,494.26/930,746.03 = 421,206.98/x
  3. Step 3: Cross multiply
    621,494.26x = 930,746.03 × 421,206.98
  4. Step 4: Simplify right side
    621,494.26x = 392,036,717,683.52
  5. Step 5: Solve for x
    x = 392,036,717,683.52/621,494.26
  6. Step 6: Final answer
    x = 630,797.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.