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Finding the Fourth Proportional to 515,009.54, 772,366.68 and 155,215.26

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Solution

The fourth proportional to 515,009.54, 772,366.68 and 155,215.26 is: 232,778.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,009.54 : 772,366.68 = 155,215.26 : x
  2. Step 2: Convert to fraction form
    515,009.54/772,366.68 = 155,215.26/x
  3. Step 3: Cross multiply
    515,009.54x = 772,366.68 × 155,215.26
  4. Step 4: Simplify right side
    515,009.54x = 119,883,095,051.54
  5. Step 5: Solve for x
    x = 119,883,095,051.54/515,009.54
  6. Step 6: Final answer
    x = 232,778.40

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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.