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Finding the Fourth Proportional to 528,665.06, 729,558.52 and 286,947.68

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Solution

The fourth proportional to 528,665.06, 729,558.52 and 286,947.68 is: 395,988.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,665.06 : 729,558.52 = 286,947.68 : x
  2. Step 2: Convert to fraction form
    528,665.06/729,558.52 = 286,947.68/x
  3. Step 3: Cross multiply
    528,665.06x = 729,558.52 × 286,947.68
  4. Step 4: Simplify right side
    528,665.06x = 209,345,124,476.84
  5. Step 5: Solve for x
    x = 209,345,124,476.84/528,665.06
  6. Step 6: Final answer
    x = 395,988.20

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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.