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Finding the Fourth Proportional to 528,798.83, 729,742.40 and 287,081.06

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Solution

The fourth proportional to 528,798.83, 729,742.40 and 287,081.06 is: 396,171.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,798.83 : 729,742.40 = 287,081.06 : x
  2. Step 2: Convert to fraction form
    528,798.83/729,742.40 = 287,081.06/x
  3. Step 3: Cross multiply
    528,798.83x = 729,742.40 × 287,081.06
  4. Step 4: Simplify right side
    528,798.83x = 209,495,220,283.54
  5. Step 5: Solve for x
    x = 209,495,220,283.54/528,798.83
  6. Step 6: Final answer
    x = 396,171.87

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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.