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Finding the Fourth Proportional to 528,363.13, 729,141.39 and 286,645.64

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Solution

The fourth proportional to 528,363.13, 729,141.39 and 286,645.64 is: 395,571.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,363.13 : 729,141.39 = 286,645.64 : x
  2. Step 2: Convert to fraction form
    528,363.13/729,141.39 = 286,645.64/x
  3. Step 3: Cross multiply
    528,363.13x = 729,141.39 × 286,645.64
  4. Step 4: Simplify right side
    528,363.13x = 209,005,200,387.04
  5. Step 5: Solve for x
    x = 209,005,200,387.04/528,363.13
  6. Step 6: Final answer
    x = 395,571.13

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1.5x scale

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.