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Finding the Fourth Proportional to 528,507.05, 729,336.03 and 286,783.48

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Solution

The fourth proportional to 528,507.05, 729,336.03 and 286,783.48 is: 395,759.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,507.05 : 729,336.03 = 286,783.48 : x
  2. Step 2: Convert to fraction form
    528,507.05/729,336.03 = 286,783.48/x
  3. Step 3: Cross multiply
    528,507.05x = 729,336.03 × 286,783.48
  4. Step 4: Simplify right side
    528,507.05x = 209,161,521,126.10
  5. Step 5: Solve for x
    x = 209,161,521,126.10/528,507.05
  6. Step 6: Final answer
    x = 395,759.19

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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.