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Finding the Fourth Proportional to 528,428.43, 729,228.85 and 286,710.42

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Solution

The fourth proportional to 528,428.43, 729,228.85 and 286,710.42 is: 395,659.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,428.43 : 729,228.85 = 286,710.42 : x
  2. Step 2: Convert to fraction form
    528,428.43/729,228.85 = 286,710.42/x
  3. Step 3: Cross multiply
    528,428.43x = 729,228.85 × 286,710.42
  4. Step 4: Simplify right side
    528,428.43x = 209,077,509,859.62
  5. Step 5: Solve for x
    x = 209,077,509,859.62/528,428.43
  6. Step 6: Final answer
    x = 395,659.09

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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.