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Finding the Fourth Proportional to 528,679.01, 729,557.47 and 286,956.43

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Solution

The fourth proportional to 528,679.01, 729,557.47 and 286,956.43 is: 395,989.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,679.01 : 729,557.47 = 286,956.43 : x
  2. Step 2: Convert to fraction form
    528,679.01/729,557.47 = 286,956.43/x
  3. Step 3: Cross multiply
    528,679.01x = 729,557.47 × 286,956.43
  4. Step 4: Simplify right side
    528,679.01x = 209,351,207,071.03
  5. Step 5: Solve for x
    x = 209,351,207,071.03/528,679.01
  6. Step 6: Final answer
    x = 395,989.25

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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.