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Finding the Fourth Proportional to 489,643.70, 734,465.55 and 454,214.30

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Solution

The fourth proportional to 489,643.70, 734,465.55 and 454,214.30 is: 681,321.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,643.70 : 734,465.55 = 454,214.30 : x
  2. Step 2: Convert to fraction form
    489,643.70/734,465.55 = 454,214.30/x
  3. Step 3: Cross multiply
    489,643.70x = 734,465.55 × 454,214.30
  4. Step 4: Simplify right side
    489,643.70x = 333,604,755,667.37
  5. Step 5: Solve for x
    x = 333,604,755,667.37/489,643.70
  6. Step 6: Final answer
    x = 681,321.45

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Similar ratio
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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.