Home / 385,345.51-531,765.85-213,270.69

Finding the Fourth Proportional to 385,345.51, 531,765.85 and 213,270.69

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Solution

The fourth proportional to 385,345.51, 531,765.85 and 213,270.69 is: 294,307.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,345.51 : 531,765.85 = 213,270.69 : x
  2. Step 2: Convert to fraction form
    385,345.51/531,765.85 = 213,270.69/x
  3. Step 3: Cross multiply
    385,345.51x = 531,765.85 × 213,270.69
  4. Step 4: Simplify right side
    385,345.51x = 113,410,069,747.94
  5. Step 5: Solve for x
    x = 113,410,069,747.94/385,345.51
  6. Step 6: Final answer
    x = 294,307.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.