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Finding the Fourth Proportional to 874,674.70, 1,312,012.05 and 313,636.30

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Solution

The fourth proportional to 874,674.70, 1,312,012.05 and 313,636.30 is: 470,454.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    874,674.70 : 1,312,012.05 = 313,636.30 : x
  2. Step 2: Convert to fraction form
    874,674.70/1,312,012.05 = 313,636.30/x
  3. Step 3: Cross multiply
    874,674.70x = 1,312,012.05 × 313,636.30
  4. Step 4: Simplify right side
    874,674.70x = 411,494,604,917.42
  5. Step 5: Solve for x
    x = 411,494,604,917.42/874,674.70
  6. Step 6: Final answer
    x = 470,454.45

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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.