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Finding the Fourth Proportional to 528,775.66, 729,719.21 and 287,058.23

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Solution

The fourth proportional to 528,775.66, 729,719.21 and 287,058.23 is: 396,145.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,775.66 : 729,719.21 = 287,058.23 : x
  2. Step 2: Convert to fraction form
    528,775.66/729,719.21 = 287,058.23/x
  3. Step 3: Cross multiply
    528,775.66x = 729,719.21 × 287,058.23
  4. Step 4: Simplify right side
    528,775.66x = 209,471,901,888.65
  5. Step 5: Solve for x
    x = 209,471,901,888.65/528,775.66
  6. Step 6: Final answer
    x = 396,145.13

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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.