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Finding the Fourth Proportional to 485,973.16, 728,368.76 and 343,859.39

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Solution

The fourth proportional to 485,973.16, 728,368.76 and 343,859.39 is: 515,370.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,973.16 : 728,368.76 = 343,859.39 : x
  2. Step 2: Convert to fraction form
    485,973.16/728,368.76 = 343,859.39/x
  3. Step 3: Cross multiply
    485,973.16x = 728,368.76 × 343,859.39
  4. Step 4: Simplify right side
    485,973.16x = 250,456,436,547.90
  5. Step 5: Solve for x
    x = 250,456,436,547.90/485,973.16
  6. Step 6: Final answer
    x = 515,370.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.