Home / 1,235,143.40-1,852,859.10-393,780.20

Finding the Fourth Proportional to 1,235,143.40, 1,852,859.10 and 393,780.20

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Solution

The fourth proportional to 1,235,143.40, 1,852,859.10 and 393,780.20 is: 590,716.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,235,143.40 : 1,852,859.10 = 393,780.20 : x
  2. Step 2: Convert to fraction form
    1,235,143.40/1,852,859.10 = 393,780.20/x
  3. Step 3: Cross multiply
    1,235,143.40x = 1,852,859.10 × 393,780.20
  4. Step 4: Simplify right side
    1,235,143.40x = 729,619,226,969.82
  5. Step 5: Solve for x
    x = 729,619,226,969.82/1,235,143.40
  6. Step 6: Final answer
    x = 590,716.21

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Double scale
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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.