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Finding the Fourth Proportional to 489,430, 734,057.20 and 129,603.12

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Solution

The fourth proportional to 489,430, 734,057.20 and 129,603.12 is: 194,381.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,430 : 734,057.20 = 129,603.12 : x
  2. Step 2: Convert to fraction form
    489,430/734,057.20 = 129,603.12/x
  3. Step 3: Cross multiply
    489,430x = 734,057.20 × 129,603.12
  4. Step 4: Simplify right side
    489,430x = 95,136,103,378.46
  5. Step 5: Solve for x
    x = 95,136,103,378.46/489,430
  6. Step 6: Final answer
    x = 194,381.43

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1.5x scale

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.