Home / 1,029,182.76-1,420,965.39-642,586.80

Finding the Fourth Proportional to 1,029,182.76, 1,420,965.39 and 642,586.80

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Solution

The fourth proportional to 1,029,182.76, 1,420,965.39 and 642,586.80 is: 887,202.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,029,182.76 : 1,420,965.39 = 642,586.80 : x
  2. Step 2: Convert to fraction form
    1,029,182.76/1,420,965.39 = 642,586.80/x
  3. Step 3: Cross multiply
    1,029,182.76x = 1,420,965.39 × 642,586.80
  4. Step 4: Simplify right side
    1,029,182.76x = 913,093,602,870.85
  5. Step 5: Solve for x
    x = 913,093,602,870.85/1,029,182.76
  6. Step 6: Final answer
    x = 887,202.58

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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.