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Finding the Fourth Proportional to 528,632.64, 729,513.72 and 286,915.18

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Solution

The fourth proportional to 528,632.64, 729,513.72 and 286,915.18 is: 395,943.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,632.64 : 729,513.72 = 286,915.18 : x
  2. Step 2: Convert to fraction form
    528,632.64/729,513.72 = 286,915.18/x
  3. Step 3: Cross multiply
    528,632.64x = 729,513.72 × 286,915.18
  4. Step 4: Simplify right side
    528,632.64x = 209,308,560,286.27
  5. Step 5: Solve for x
    x = 209,308,560,286.27/528,632.64
  6. Step 6: Final answer
    x = 395,943.32

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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.