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Finding the Fourth Proportional to 571,685.60, 788,920.74 and 313,557.28

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Solution

The fourth proportional to 571,685.60, 788,920.74 and 313,557.28 is: 432,706.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,685.60 : 788,920.74 = 313,557.28 : x
  2. Step 2: Convert to fraction form
    571,685.60/788,920.74 = 313,557.28/x
  3. Step 3: Cross multiply
    571,685.60x = 788,920.74 × 313,557.28
  4. Step 4: Simplify right side
    571,685.60x = 247,371,839,397.69
  5. Step 5: Solve for x
    x = 247,371,839,397.69/571,685.60
  6. Step 6: Final answer
    x = 432,706.09

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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.