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Finding the Fourth Proportional to 572,415.40, 858,720.30 and 306,103.60

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Solution

The fourth proportional to 572,415.40, 858,720.30 and 306,103.60 is: 459,207.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,415.40 : 858,720.30 = 306,103.60 : x
  2. Step 2: Convert to fraction form
    572,415.40/858,720.30 = 306,103.60/x
  3. Step 3: Cross multiply
    572,415.40x = 858,720.30 × 306,103.60
  4. Step 4: Simplify right side
    572,415.40x = 262,857,375,223.08
  5. Step 5: Solve for x
    x = 262,857,375,223.08/572,415.40
  6. Step 6: Final answer
    x = 459,207.38

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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.