Home / 651,138.40-977,629.20-511,055.20

Finding the Fourth Proportional to 651,138.40, 977,629.20 and 511,055.20

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Solution

The fourth proportional to 651,138.40, 977,629.20 and 511,055.20 is: 767,306.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,138.40 : 977,629.20 = 511,055.20 : x
  2. Step 2: Convert to fraction form
    651,138.40/977,629.20 = 511,055.20/x
  3. Step 3: Cross multiply
    651,138.40x = 977,629.20 × 511,055.20
  4. Step 4: Simplify right side
    651,138.40x = 499,622,486,331.84
  5. Step 5: Solve for x
    x = 499,622,486,331.84/651,138.40
  6. Step 6: Final answer
    x = 767,306.13

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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.