Home / 385,427.20-578,140.80-243,709.60

Finding the Fourth Proportional to 385,427.20, 578,140.80 and 243,709.60

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Solution

The fourth proportional to 385,427.20, 578,140.80 and 243,709.60 is: 365,564.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,427.20 : 578,140.80 = 243,709.60 : x
  2. Step 2: Convert to fraction form
    385,427.20/578,140.80 = 243,709.60/x
  3. Step 3: Cross multiply
    385,427.20x = 578,140.80 × 243,709.60
  4. Step 4: Simplify right side
    385,427.20x = 140,898,463,111.68
  5. Step 5: Solve for x
    x = 140,898,463,111.68/385,427.20
  6. Step 6: Final answer
    x = 365,564.40

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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.