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Finding the Fourth Proportional to 489,938.20, 734,907.30 and 411,206.20

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Solution

The fourth proportional to 489,938.20, 734,907.30 and 411,206.20 is: 616,809.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,938.20 : 734,907.30 = 411,206.20 : x
  2. Step 2: Convert to fraction form
    489,938.20/734,907.30 = 411,206.20/x
  3. Step 3: Cross multiply
    489,938.20x = 734,907.30 × 411,206.20
  4. Step 4: Simplify right side
    489,938.20x = 302,198,438,185.26
  5. Step 5: Solve for x
    x = 302,198,438,185.26/489,938.20
  6. Step 6: Final answer
    x = 616,809.30

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Double scale
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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.