Home / 745,641.39-1,028,921.91-418,928.82

Finding the Fourth Proportional to 745,641.39, 1,028,921.91 and 418,928.82

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Solution

The fourth proportional to 745,641.39, 1,028,921.91 and 418,928.82 is: 578,086.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    745,641.39 : 1,028,921.91 = 418,928.82 : x
  2. Step 2: Convert to fraction form
    745,641.39/1,028,921.91 = 418,928.82/x
  3. Step 3: Cross multiply
    745,641.39x = 1,028,921.91 × 418,928.82
  4. Step 4: Simplify right side
    745,641.39x = 431,045,041,628.45
  5. Step 5: Solve for x
    x = 431,045,041,628.45/745,641.39
  6. Step 6: Final answer
    x = 578,086.26

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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.