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Finding the Fourth Proportional to 528,680.40, 729,559.44 and 286,957.86

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Solution

The fourth proportional to 528,680.40, 729,559.44 and 286,957.86 is: 395,991.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,680.40 : 729,559.44 = 286,957.86 : x
  2. Step 2: Convert to fraction form
    528,680.40/729,559.44 = 286,957.86/x
  3. Step 3: Cross multiply
    528,680.40x = 729,559.44 × 286,957.86
  4. Step 4: Simplify right side
    528,680.40x = 209,352,815,645.20
  5. Step 5: Solve for x
    x = 209,352,815,645.20/528,680.40
  6. Step 6: Final answer
    x = 395,991.26

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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.