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Finding the Fourth Proportional to 571,396.78, 788,474.54 and 316,726.30

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Solution

The fourth proportional to 571,396.78, 788,474.54 and 316,726.30 is: 437,052.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,396.78 : 788,474.54 = 316,726.30 : x
  2. Step 2: Convert to fraction form
    571,396.78/788,474.54 = 316,726.30/x
  3. Step 3: Cross multiply
    571,396.78x = 788,474.54 × 316,726.30
  4. Step 4: Simplify right side
    571,396.78x = 249,730,623,698.40
  5. Step 5: Solve for x
    x = 249,730,623,698.40/571,396.78
  6. Step 6: Final answer
    x = 437,052.91

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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.