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Finding the Fourth Proportional to 854,792.80, 1,282,189.20 and 412,424.80

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Solution

The fourth proportional to 854,792.80, 1,282,189.20 and 412,424.80 is: 618,637.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    854,792.80 : 1,282,189.20 = 412,424.80 : x
  2. Step 2: Convert to fraction form
    854,792.80/1,282,189.20 = 412,424.80/x
  3. Step 3: Cross multiply
    854,792.80x = 1,282,189.20 × 412,424.80
  4. Step 4: Simplify right side
    854,792.80x = 528,806,624,372.16
  5. Step 5: Solve for x
    x = 528,806,624,372.16/854,792.80
  6. Step 6: Final answer
    x = 618,637.20

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Double scale
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Similar ratio
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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.