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Finding the Fourth Proportional to 570,538.69, 787,367.99 and 315,889.88

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Solution

The fourth proportional to 570,538.69, 787,367.99 and 315,889.88 is: 435,941.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,538.69 : 787,367.99 = 315,889.88 : x
  2. Step 2: Convert to fraction form
    570,538.69/787,367.99 = 315,889.88/x
  3. Step 3: Cross multiply
    570,538.69x = 787,367.99 × 315,889.88
  4. Step 4: Simplify right side
    570,538.69x = 248,721,576,729.83
  5. Step 5: Solve for x
    x = 248,721,576,729.83/570,538.69
  6. Step 6: Final answer
    x = 435,941.65

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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.