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Finding the Fourth Proportional to 489,417.40, 734,393.58 and 189,909.73

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Solution

The fourth proportional to 489,417.40, 734,393.58 and 189,909.73 is: 284,968.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,417.40 : 734,393.58 = 189,909.73 : x
  2. Step 2: Convert to fraction form
    489,417.40/734,393.58 = 189,909.73/x
  3. Step 3: Cross multiply
    489,417.40x = 734,393.58 × 189,909.73
  4. Step 4: Simplify right side
    489,417.40x = 139,468,486,491.53
  5. Step 5: Solve for x
    x = 139,468,486,491.53/489,417.40
  6. Step 6: Final answer
    x = 284,968.39

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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.