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Finding the Fourth Proportional to 528,502.05, 729,329.13 and 286,778.48

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Solution

The fourth proportional to 528,502.05, 729,329.13 and 286,778.48 is: 395,752.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,502.05 : 729,329.13 = 286,778.48 : x
  2. Step 2: Convert to fraction form
    528,502.05/729,329.13 = 286,778.48/x
  3. Step 3: Cross multiply
    528,502.05x = 729,329.13 × 286,778.48
  4. Step 4: Simplify right side
    528,502.05x = 209,155,895,674.48
  5. Step 5: Solve for x
    x = 209,155,895,674.48/528,502.05
  6. Step 6: Final answer
    x = 395,752.29

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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.