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Finding the Fourth Proportional to 528,103.72, 728,783.52 and 286,386.22

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Solution

The fourth proportional to 528,103.72, 728,783.52 and 286,386.22 is: 395,213.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,103.72 : 728,783.52 = 286,386.22 : x
  2. Step 2: Convert to fraction form
    528,103.72/728,783.52 = 286,386.22/x
  3. Step 3: Cross multiply
    528,103.72x = 728,783.52 × 286,386.22
  4. Step 4: Simplify right side
    528,103.72x = 208,713,557,491.09
  5. Step 5: Solve for x
    x = 208,713,557,491.09/528,103.72
  6. Step 6: Final answer
    x = 395,213.19

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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.