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Finding the Fourth Proportional to 528,436.44, 729,236.52 and 286,724.34

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Solution

The fourth proportional to 528,436.44, 729,236.52 and 286,724.34 is: 395,676.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,436.44 : 729,236.52 = 286,724.34 : x
  2. Step 2: Convert to fraction form
    528,436.44/729,236.52 = 286,724.34/x
  3. Step 3: Cross multiply
    528,436.44x = 729,236.52 × 286,724.34
  4. Step 4: Simplify right side
    528,436.44x = 209,089,859,900.90
  5. Step 5: Solve for x
    x = 209,089,859,900.90/528,436.44
  6. Step 6: Final answer
    x = 395,676.46

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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.