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Finding the Fourth Proportional to 587,130.80, 880,696.20 and 421,242.80

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Solution

The fourth proportional to 587,130.80, 880,696.20 and 421,242.80 is: 631,864.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    587,130.80 : 880,696.20 = 421,242.80 : x
  2. Step 2: Convert to fraction form
    587,130.80/880,696.20 = 421,242.80/x
  3. Step 3: Cross multiply
    587,130.80x = 880,696.20 × 421,242.80
  4. Step 4: Simplify right side
    587,130.80x = 370,986,933,237.36
  5. Step 5: Solve for x
    x = 370,986,933,237.36/587,130.80
  6. Step 6: Final answer
    x = 631,864.20

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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.