Home / 874,857.20-1,312,285.80-313,818.80

Finding the Fourth Proportional to 874,857.20, 1,312,285.80 and 313,818.80

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Solution

The fourth proportional to 874,857.20, 1,312,285.80 and 313,818.80 is: 470,728.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    874,857.20 : 1,312,285.80 = 313,818.80 : x
  2. Step 2: Convert to fraction form
    874,857.20/1,312,285.80 = 313,818.80/x
  3. Step 3: Cross multiply
    874,857.20x = 1,312,285.80 × 313,818.80
  4. Step 4: Simplify right side
    874,857.20x = 411,819,955,013.04
  5. Step 5: Solve for x
    x = 411,819,955,013.04/874,857.20
  6. Step 6: Final answer
    x = 470,728.20

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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.