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Finding the Fourth Proportional to 621,003.55, 931,505.33 and 621,003.55

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Solution

The fourth proportional to 621,003.55, 931,505.33 and 621,003.55 is: 931,505.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,003.55 : 931,505.33 = 621,003.55 : x
  2. Step 2: Convert to fraction form
    621,003.55/931,505.33 = 621,003.55/x
  3. Step 3: Cross multiply
    621,003.55x = 931,505.33 × 621,003.55
  4. Step 4: Simplify right side
    621,003.55x = 578,468,113,668.90
  5. Step 5: Solve for x
    x = 578,468,113,668.90/621,003.55
  6. Step 6: Final answer
    x = 931,505.33

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Double scale
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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.