Home / 1,186,728.89-1,637,690.88-642,864.68

Finding the Fourth Proportional to 1,186,728.89, 1,637,690.88 and 642,864.68

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Solution

The fourth proportional to 1,186,728.89, 1,637,690.88 and 642,864.68 is: 887,155.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,186,728.89 : 1,637,690.88 = 642,864.68 : x
  2. Step 2: Convert to fraction form
    1,186,728.89/1,637,690.88 = 642,864.68/x
  3. Step 3: Cross multiply
    1,186,728.89x = 1,637,690.88 × 642,864.68
  4. Step 4: Simplify right side
    1,186,728.89x = 1,052,813,617,186.96
  5. Step 5: Solve for x
    x = 1,052,813,617,186.96/1,186,728.89
  6. Step 6: Final answer
    x = 887,155.97

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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.