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Finding the Fourth Proportional to 528,657.02, 729,544.86 and 286,939.58

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Solution

The fourth proportional to 528,657.02, 729,544.86 and 286,939.58 is: 395,975.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,657.02 : 729,544.86 = 286,939.58 : x
  2. Step 2: Convert to fraction form
    528,657.02/729,544.86 = 286,939.58/x
  3. Step 3: Cross multiply
    528,657.02x = 729,544.86 × 286,939.58
  4. Step 4: Simplify right side
    528,657.02x = 209,335,292,071.84
  5. Step 5: Solve for x
    x = 209,335,292,071.84/528,657.02
  6. Step 6: Final answer
    x = 395,975.63

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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.