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Finding the Fourth Proportional to 660,537.40, 990,806.10 and 432,214.60

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Solution

The fourth proportional to 660,537.40, 990,806.10 and 432,214.60 is: 648,321.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,537.40 : 990,806.10 = 432,214.60 : x
  2. Step 2: Convert to fraction form
    660,537.40/990,806.10 = 432,214.60/x
  3. Step 3: Cross multiply
    660,537.40x = 990,806.10 × 432,214.60
  4. Step 4: Simplify right side
    660,537.40x = 428,240,862,189.06
  5. Step 5: Solve for x
    x = 428,240,862,189.06/660,537.40
  6. Step 6: Final answer
    x = 648,321.90

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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.