Home / 765,144.56-1,055,907.59-420,985.01

Finding the Fourth Proportional to 765,144.56, 1,055,907.59 and 420,985.01

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Solution

The fourth proportional to 765,144.56, 1,055,907.59 and 420,985.01 is: 580,963.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    765,144.56 : 1,055,907.59 = 420,985.01 : x
  2. Step 2: Convert to fraction form
    765,144.56/1,055,907.59 = 420,985.01/x
  3. Step 3: Cross multiply
    765,144.56x = 1,055,907.59 × 420,985.01
  4. Step 4: Simplify right side
    765,144.56x = 444,521,259,950.76
  5. Step 5: Solve for x
    x = 444,521,259,950.76/765,144.56
  6. Step 6: Final answer
    x = 580,963.76

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Double scale
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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.