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Finding the Fourth Proportional to 489,667.40, 734,501.10 and 436,214.60

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Solution

The fourth proportional to 489,667.40, 734,501.10 and 436,214.60 is: 654,321.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,667.40 : 734,501.10 = 436,214.60 : x
  2. Step 2: Convert to fraction form
    489,667.40/734,501.10 = 436,214.60/x
  3. Step 3: Cross multiply
    489,667.40x = 734,501.10 × 436,214.60
  4. Step 4: Simplify right side
    489,667.40x = 320,400,103,536.06
  5. Step 5: Solve for x
    x = 320,400,103,536.06/489,667.40
  6. Step 6: Final answer
    x = 654,321.90

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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.