Home / 511,265.04-765,780-421,510.56

Finding the Fourth Proportional to 511,265.04, 765,780 and 421,510.56

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Solution

The fourth proportional to 511,265.04, 765,780 and 421,510.56 is: 631,344.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    511,265.04 : 765,780 = 421,510.56 : x
  2. Step 2: Convert to fraction form
    511,265.04/765,780 = 421,510.56/x
  3. Step 3: Cross multiply
    511,265.04x = 765,780 × 421,510.56
  4. Step 4: Simplify right side
    511,265.04x = 322,784,356,636.80
  5. Step 5: Solve for x
    x = 322,784,356,636.80/511,265.04
  6. Step 6: Final answer
    x = 631,344.47

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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.