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Finding the Fourth Proportional to 528,538.45, 729,384.97 and 286,820.96

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Solution

The fourth proportional to 528,538.45, 729,384.97 and 286,820.96 is: 395,813.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,538.45 : 729,384.97 = 286,820.96 : x
  2. Step 2: Convert to fraction form
    528,538.45/729,384.97 = 286,820.96/x
  3. Step 3: Cross multiply
    528,538.45x = 729,384.97 × 286,820.96
  4. Step 4: Simplify right side
    528,538.45x = 209,202,897,304.97
  5. Step 5: Solve for x
    x = 209,202,897,304.97/528,538.45
  6. Step 6: Final answer
    x = 395,813.96

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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.