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Finding the Fourth Proportional to 571,456.80, 788,619.96 and 313,328.40

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Solution

The fourth proportional to 571,456.80, 788,619.96 and 313,328.40 is: 432,398.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,456.80 : 788,619.96 = 313,328.40 : x
  2. Step 2: Convert to fraction form
    571,456.80/788,619.96 = 313,328.40/x
  3. Step 3: Cross multiply
    571,456.80x = 788,619.96 × 313,328.40
  4. Step 4: Simplify right side
    571,456.80x = 247,097,030,274.86
  5. Step 5: Solve for x
    x = 247,097,030,274.86/571,456.80
  6. Step 6: Final answer
    x = 432,398.44

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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.