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Finding the Fourth Proportional to 515,648.40, 772,681.44 and 215,965.02

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Solution

The fourth proportional to 515,648.40, 772,681.44 and 215,965.02 is: 323,616.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,648.40 : 772,681.44 = 215,965.02 : x
  2. Step 2: Convert to fraction form
    515,648.40/772,681.44 = 215,965.02/x
  3. Step 3: Cross multiply
    515,648.40x = 772,681.44 × 215,965.02
  4. Step 4: Simplify right side
    515,648.40x = 166,872,162,643.23
  5. Step 5: Solve for x
    x = 166,872,162,643.23/515,648.40
  6. Step 6: Final answer
    x = 323,616.17

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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.