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Finding the Fourth Proportional to 415,000.80, 621,626.40 and 415,000.80

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Solution

The fourth proportional to 415,000.80, 621,626.40 and 415,000.80 is: 621,626.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,000.80 : 621,626.40 = 415,000.80 : x
  2. Step 2: Convert to fraction form
    415,000.80/621,626.40 = 415,000.80/x
  3. Step 3: Cross multiply
    415,000.80x = 621,626.40 × 415,000.80
  4. Step 4: Simplify right side
    415,000.80x = 257,975,453,301.12
  5. Step 5: Solve for x
    x = 257,975,453,301.12/415,000.80
  6. Step 6: Final answer
    x = 621,626.40

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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.