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Finding the Fourth Proportional to 669,991.80, 1,004,987.70 and 371,393.40

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Solution

The fourth proportional to 669,991.80, 1,004,987.70 and 371,393.40 is: 557,090.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,991.80 : 1,004,987.70 = 371,393.40 : x
  2. Step 2: Convert to fraction form
    669,991.80/1,004,987.70 = 371,393.40/x
  3. Step 3: Cross multiply
    669,991.80x = 1,004,987.70 × 371,393.40
  4. Step 4: Simplify right side
    669,991.80x = 373,245,798,861.18
  5. Step 5: Solve for x
    x = 373,245,798,861.18/669,991.80
  6. Step 6: Final answer
    x = 557,090.10

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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.