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Finding the Fourth Proportional to 647,278.60, 970,917.90 and 423,329.80

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Solution

The fourth proportional to 647,278.60, 970,917.90 and 423,329.80 is: 634,994.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,278.60 : 970,917.90 = 423,329.80 : x
  2. Step 2: Convert to fraction form
    647,278.60/970,917.90 = 423,329.80/x
  3. Step 3: Cross multiply
    647,278.60x = 970,917.90 × 423,329.80
  4. Step 4: Simplify right side
    647,278.60x = 411,018,480,423.42
  5. Step 5: Solve for x
    x = 411,018,480,423.42/647,278.60
  6. Step 6: Final answer
    x = 634,994.70

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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.