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Finding the Fourth Proportional to 660,310.80, 990,466.20 and 239,434.80

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Solution

The fourth proportional to 660,310.80, 990,466.20 and 239,434.80 is: 359,152.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,310.80 : 990,466.20 = 239,434.80 : x
  2. Step 2: Convert to fraction form
    660,310.80/990,466.20 = 239,434.80/x
  3. Step 3: Cross multiply
    660,310.80x = 990,466.20 × 239,434.80
  4. Step 4: Simplify right side
    660,310.80x = 237,152,076,503.76
  5. Step 5: Solve for x
    x = 237,152,076,503.76/660,310.80
  6. Step 6: Final answer
    x = 359,152.20

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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.