Home / 403,000.31-556,140.42-221,708.35

Finding the Fourth Proportional to 403,000.31, 556,140.42 and 221,708.35

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Solution

The fourth proportional to 403,000.31, 556,140.42 and 221,708.35 is: 305,957.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,000.31 : 556,140.42 = 221,708.35 : x
  2. Step 2: Convert to fraction form
    403,000.31/556,140.42 = 221,708.35/x
  3. Step 3: Cross multiply
    403,000.31x = 556,140.42 × 221,708.35
  4. Step 4: Simplify right side
    403,000.31x = 123,300,972,453.39
  5. Step 5: Solve for x
    x = 123,300,972,453.39/403,000.31
  6. Step 6: Final answer
    x = 305,957.52

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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.