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Finding the Fourth Proportional to 385,370.40, 578,055.60 and 148,720.80

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Solution

The fourth proportional to 385,370.40, 578,055.60 and 148,720.80 is: 223,081.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,370.40 : 578,055.60 = 148,720.80 : x
  2. Step 2: Convert to fraction form
    385,370.40/578,055.60 = 148,720.80/x
  3. Step 3: Cross multiply
    385,370.40x = 578,055.60 × 148,720.80
  4. Step 4: Simplify right side
    385,370.40x = 85,968,891,276.48
  5. Step 5: Solve for x
    x = 85,968,891,276.48/385,370.40
  6. Step 6: Final answer
    x = 223,081.20

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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.