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Finding the Fourth Proportional to 647,220.40, 970,830.60 and 363,785.20

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Solution

The fourth proportional to 647,220.40, 970,830.60 and 363,785.20 is: 545,677.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,220.40 : 970,830.60 = 363,785.20 : x
  2. Step 2: Convert to fraction form
    647,220.40/970,830.60 = 363,785.20/x
  3. Step 3: Cross multiply
    647,220.40x = 970,830.60 × 363,785.20
  4. Step 4: Simplify right side
    647,220.40x = 353,173,803,987.12
  5. Step 5: Solve for x
    x = 353,173,803,987.12/647,220.40
  6. Step 6: Final answer
    x = 545,677.80

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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.