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Finding the Fourth Proportional to 528,427.43, 729,227.47 and 286,709.42

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Solution

The fourth proportional to 528,427.43, 729,227.47 and 286,709.42 is: 395,657.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,427.43 : 729,227.47 = 286,709.42 : x
  2. Step 2: Convert to fraction form
    528,427.43/729,227.47 = 286,709.42/x
  3. Step 3: Cross multiply
    528,427.43x = 729,227.47 × 286,709.42
  4. Step 4: Simplify right side
    528,427.43x = 209,076,385,865.18
  5. Step 5: Solve for x
    x = 209,076,385,865.18/528,427.43
  6. Step 6: Final answer
    x = 395,657.71

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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.