Home / 714,228.80-985,647.83-391,968.90

Finding the Fourth Proportional to 714,228.80, 985,647.83 and 391,968.90

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Solution

The fourth proportional to 714,228.80, 985,647.83 and 391,968.90 is: 540,923.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,228.80 : 985,647.83 = 391,968.90 : x
  2. Step 2: Convert to fraction form
    714,228.80/985,647.83 = 391,968.90/x
  3. Step 3: Cross multiply
    714,228.80x = 985,647.83 × 391,968.90
  4. Step 4: Simplify right side
    714,228.80x = 386,343,293,752.64
  5. Step 5: Solve for x
    x = 386,343,293,752.64/714,228.80
  6. Step 6: Final answer
    x = 540,923.72

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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.