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Finding the Fourth Proportional to 571,356, 788,472 and 316,745.28

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Solution

The fourth proportional to 571,356, 788,472 and 316,745.28 is: 437,108.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,356 : 788,472 = 316,745.28 : x
  2. Step 2: Convert to fraction form
    571,356/788,472 = 316,745.28/x
  3. Step 3: Cross multiply
    571,356x = 788,472 × 316,745.28
  4. Step 4: Simplify right side
    571,356x = 249,744,784,412.16
  5. Step 5: Solve for x
    x = 249,744,784,412.16/571,356
  6. Step 6: Final answer
    x = 437,108.89

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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.