Home / 820,631.48-1,231,485.44-288,138.80

Finding the Fourth Proportional to 820,631.48, 1,231,485.44 and 288,138.80

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Solution

The fourth proportional to 820,631.48, 1,231,485.44 and 288,138.80 is: 432,397.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,631.48 : 1,231,485.44 = 288,138.80 : x
  2. Step 2: Convert to fraction form
    820,631.48/1,231,485.44 = 288,138.80/x
  3. Step 3: Cross multiply
    820,631.48x = 1,231,485.44 × 288,138.80
  4. Step 4: Simplify right side
    820,631.48x = 354,838,736,899.07
  5. Step 5: Solve for x
    x = 354,838,736,899.07/820,631.48
  6. Step 6: Final answer
    x = 432,397.18

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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.