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Finding the Fourth Proportional to 571,438.69, 788,586.50 and 316,789.87

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Solution

The fourth proportional to 571,438.69, 788,586.50 and 316,789.87 is: 437,170.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,438.69 : 788,586.50 = 316,789.87 : x
  2. Step 2: Convert to fraction form
    571,438.69/788,586.50 = 316,789.87/x
  3. Step 3: Cross multiply
    571,438.69x = 788,586.50 × 316,789.87
  4. Step 4: Simplify right side
    571,438.69x = 249,816,214,818.76
  5. Step 5: Solve for x
    x = 249,816,214,818.76/571,438.69
  6. Step 6: Final answer
    x = 437,170.63

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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.