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Finding the Fourth Proportional to 489,740.20, 734,610.30 and 434,627.80

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Solution

The fourth proportional to 489,740.20, 734,610.30 and 434,627.80 is: 651,941.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,740.20 : 734,610.30 = 434,627.80 : x
  2. Step 2: Convert to fraction form
    489,740.20/734,610.30 = 434,627.80/x
  3. Step 3: Cross multiply
    489,740.20x = 734,610.30 × 434,627.80
  4. Step 4: Simplify right side
    489,740.20x = 319,282,058,546.34
  5. Step 5: Solve for x
    x = 319,282,058,546.34/489,740.20
  6. Step 6: Final answer
    x = 651,941.70

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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.