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Finding the Fourth Proportional to 528,661.82, 729,533.76 and 286,939.20

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Solution

The fourth proportional to 528,661.82, 729,533.76 and 286,939.20 is: 395,965.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,661.82 : 729,533.76 = 286,939.20 : x
  2. Step 2: Convert to fraction form
    528,661.82/729,533.76 = 286,939.20/x
  3. Step 3: Cross multiply
    528,661.82x = 729,533.76 × 286,939.20
  4. Step 4: Simplify right side
    528,661.82x = 209,331,833,467.39
  5. Step 5: Solve for x
    x = 209,331,833,467.39/528,661.82
  6. Step 6: Final answer
    x = 395,965.48

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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.