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Finding the Fourth Proportional to 528,391.47, 729,181.53 and 286,673.97

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Solution

The fourth proportional to 528,391.47, 729,181.53 and 286,673.97 is: 395,610.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,391.47 : 729,181.53 = 286,673.97 : x
  2. Step 2: Convert to fraction form
    528,391.47/729,181.53 = 286,673.97/x
  3. Step 3: Cross multiply
    528,391.47x = 729,181.53 × 286,673.97
  4. Step 4: Simplify right side
    528,391.47x = 209,037,364,055.77
  5. Step 5: Solve for x
    x = 209,037,364,055.77/528,391.47
  6. Step 6: Final answer
    x = 395,610.78

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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.