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Finding the Fourth Proportional to 511,511.52, 705,869.70 and 282,078.48

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Solution

The fourth proportional to 511,511.52, 705,869.70 and 282,078.48 is: 389,259.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    511,511.52 : 705,869.70 = 282,078.48 : x
  2. Step 2: Convert to fraction form
    511,511.52/705,869.70 = 282,078.48/x
  3. Step 3: Cross multiply
    511,511.52x = 705,869.70 × 282,078.48
  4. Step 4: Simplify right side
    511,511.52x = 199,110,652,054.06
  5. Step 5: Solve for x
    x = 199,110,652,054.06/511,511.52
  6. Step 6: Final answer
    x = 389,259.37

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1.5x scale

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.