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Finding the Fourth Proportional to 689,896, 952,056.24 and 388,090

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Solution

The fourth proportional to 689,896, 952,056.24 and 388,090 is: 535,564.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,896 : 952,056.24 = 388,090 : x
  2. Step 2: Convert to fraction form
    689,896/952,056.24 = 388,090/x
  3. Step 3: Cross multiply
    689,896x = 952,056.24 × 388,090
  4. Step 4: Simplify right side
    689,896x = 369,483,506,181.60
  5. Step 5: Solve for x
    x = 369,483,506,181.60/689,896
  6. Step 6: Final answer
    x = 535,564.06

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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.