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Finding the Fourth Proportional to 528,665.31, 729,538.58 and 286,942.74

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Solution

The fourth proportional to 528,665.31, 729,538.58 and 286,942.74 is: 395,970.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,665.31 : 729,538.58 = 286,942.74 : x
  2. Step 2: Convert to fraction form
    528,665.31/729,538.58 = 286,942.74/x
  3. Step 3: Cross multiply
    528,665.31x = 729,538.58 × 286,942.74
  4. Step 4: Simplify right side
    528,665.31x = 209,335,797,646.20
  5. Step 5: Solve for x
    x = 209,335,797,646.20/528,665.31
  6. Step 6: Final answer
    x = 395,970.37

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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.