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Finding the Fourth Proportional to 385,326, 531,570.24 and 249,403.68

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Solution

The fourth proportional to 385,326, 531,570.24 and 249,403.68 is: 344,060.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,326 : 531,570.24 = 249,403.68 : x
  2. Step 2: Convert to fraction form
    385,326/531,570.24 = 249,403.68/x
  3. Step 3: Cross multiply
    385,326x = 531,570.24 × 249,403.68
  4. Step 4: Simplify right side
    385,326x = 132,575,574,034.48
  5. Step 5: Solve for x
    x = 132,575,574,034.48/385,326
  6. Step 6: Final answer
    x = 344,060.81

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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.