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Finding the Fourth Proportional to 669,878.80, 1,004,818.20 and 543,907.60

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Solution

The fourth proportional to 669,878.80, 1,004,818.20 and 543,907.60 is: 815,861.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,878.80 : 1,004,818.20 = 543,907.60 : x
  2. Step 2: Convert to fraction form
    669,878.80/1,004,818.20 = 543,907.60/x
  3. Step 3: Cross multiply
    669,878.80x = 1,004,818.20 × 543,907.60
  4. Step 4: Simplify right side
    669,878.80x = 546,528,255,598.32
  5. Step 5: Solve for x
    x = 546,528,255,598.32/669,878.80
  6. Step 6: Final answer
    x = 815,861.40

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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.