Home / 687,426.42-1,029,919.59-287,186.34

Finding the Fourth Proportional to 687,426.42, 1,029,919.59 and 287,186.34

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Solution

The fourth proportional to 687,426.42, 1,029,919.59 and 287,186.34 is: 430,269.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,426.42 : 1,029,919.59 = 287,186.34 : x
  2. Step 2: Convert to fraction form
    687,426.42/1,029,919.59 = 287,186.34/x
  3. Step 3: Cross multiply
    687,426.42x = 1,029,919.59 × 287,186.34
  4. Step 4: Simplify right side
    687,426.42x = 295,778,837,546.40
  5. Step 5: Solve for x
    x = 295,778,837,546.40/687,426.42
  6. Step 6: Final answer
    x = 430,269.81

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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.