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Finding the Fourth Proportional to 385,155.36, 575,173.86 and 380,985.12

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Solution

The fourth proportional to 385,155.36, 575,173.86 and 380,985.12 is: 568,946.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,155.36 : 575,173.86 = 380,985.12 : x
  2. Step 2: Convert to fraction form
    385,155.36/575,173.86 = 380,985.12/x
  3. Step 3: Cross multiply
    385,155.36x = 575,173.86 × 380,985.12
  4. Step 4: Simplify right side
    385,155.36x = 219,132,682,072.96
  5. Step 5: Solve for x
    x = 219,132,682,072.96/385,155.36
  6. Step 6: Final answer
    x = 568,946.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.