Home / 820,076.81-1,131,706.47-457,500.65

Finding the Fourth Proportional to 820,076.81, 1,131,706.47 and 457,500.65

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Solution

The fourth proportional to 820,076.81, 1,131,706.47 and 457,500.65 is: 631,351.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,076.81 : 1,131,706.47 = 457,500.65 : x
  2. Step 2: Convert to fraction form
    820,076.81/1,131,706.47 = 457,500.65/x
  3. Step 3: Cross multiply
    820,076.81x = 1,131,706.47 × 457,500.65
  4. Step 4: Simplify right side
    820,076.81x = 517,756,439,975.67
  5. Step 5: Solve for x
    x = 517,756,439,975.67/820,076.81
  6. Step 6: Final answer
    x = 631,351.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.