Home / 780,781.70-1,170,079.05-621,130.70

Finding the Fourth Proportional to 780,781.70, 1,170,079.05 and 621,130.70

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Solution

The fourth proportional to 780,781.70, 1,170,079.05 and 621,130.70 is: 930,826.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,781.70 : 1,170,079.05 = 621,130.70 : x
  2. Step 2: Convert to fraction form
    780,781.70/1,170,079.05 = 621,130.70/x
  3. Step 3: Cross multiply
    780,781.70x = 1,170,079.05 × 621,130.70
  4. Step 4: Simplify right side
    780,781.70x = 726,772,019,381.84
  5. Step 5: Solve for x
    x = 726,772,019,381.84/780,781.70
  6. Step 6: Final answer
    x = 930,826.14

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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.