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Finding the Fourth Proportional to 528,521.19, 729,361.22 and 286,803.81

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Solution

The fourth proportional to 528,521.19, 729,361.22 and 286,803.81 is: 395,790.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,521.19 : 729,361.22 = 286,803.81 : x
  2. Step 2: Convert to fraction form
    528,521.19/729,361.22 = 286,803.81/x
  3. Step 3: Cross multiply
    528,521.19x = 729,361.22 × 286,803.81
  4. Step 4: Simplify right side
    528,521.19x = 209,183,574,083.54
  5. Step 5: Solve for x
    x = 209,183,574,083.54/528,521.19
  6. Step 6: Final answer
    x = 395,790.33

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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.