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Finding the Fourth Proportional to 528,248.82, 728,979.06 and 286,530.78

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Solution

The fourth proportional to 528,248.82, 728,979.06 and 286,530.78 is: 395,410.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,248.82 : 728,979.06 = 286,530.78 : x
  2. Step 2: Convert to fraction form
    528,248.82/728,979.06 = 286,530.78/x
  3. Step 3: Cross multiply
    528,248.82x = 728,979.06 × 286,530.78
  4. Step 4: Simplify right side
    528,248.82x = 208,874,938,665.47
  5. Step 5: Solve for x
    x = 208,874,938,665.47/528,248.82
  6. Step 6: Final answer
    x = 395,410.14

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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.