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Finding the Fourth Proportional to 874,879.20, 1,312,318.80 and 313,840.80

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Solution

The fourth proportional to 874,879.20, 1,312,318.80 and 313,840.80 is: 470,761.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    874,879.20 : 1,312,318.80 = 313,840.80 : x
  2. Step 2: Convert to fraction form
    874,879.20/1,312,318.80 = 313,840.80/x
  3. Step 3: Cross multiply
    874,879.20x = 1,312,318.80 × 313,840.80
  4. Step 4: Simplify right side
    874,879.20x = 411,859,182,047.04
  5. Step 5: Solve for x
    x = 411,859,182,047.04/874,879.20
  6. Step 6: Final answer
    x = 470,761.20

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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.