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Finding the Fourth Proportional to 612,708.80, 919,063.20 and 297,780.80

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Solution

The fourth proportional to 612,708.80, 919,063.20 and 297,780.80 is: 446,671.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,708.80 : 919,063.20 = 297,780.80 : x
  2. Step 2: Convert to fraction form
    612,708.80/919,063.20 = 297,780.80/x
  3. Step 3: Cross multiply
    612,708.80x = 919,063.20 × 297,780.80
  4. Step 4: Simplify right side
    612,708.80x = 273,679,374,946.56
  5. Step 5: Solve for x
    x = 273,679,374,946.56/612,708.80
  6. Step 6: Final answer
    x = 446,671.20

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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.