Home / 578,090.80-867,136.20-438,122.80

Finding the Fourth Proportional to 578,090.80, 867,136.20 and 438,122.80

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Solution

The fourth proportional to 578,090.80, 867,136.20 and 438,122.80 is: 657,184.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,090.80 : 867,136.20 = 438,122.80 : x
  2. Step 2: Convert to fraction form
    578,090.80/867,136.20 = 438,122.80/x
  3. Step 3: Cross multiply
    578,090.80x = 867,136.20 × 438,122.80
  4. Step 4: Simplify right side
    578,090.80x = 379,912,139,925.36
  5. Step 5: Solve for x
    x = 379,912,139,925.36/578,090.80
  6. Step 6: Final answer
    x = 657,184.20

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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.