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Finding the Fourth Proportional to 689,894, 952,053.48 and 388,088

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Solution

The fourth proportional to 689,894, 952,053.48 and 388,088 is: 535,561.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,894 : 952,053.48 = 388,088 : x
  2. Step 2: Convert to fraction form
    689,894/952,053.48 = 388,088/x
  3. Step 3: Cross multiply
    689,894x = 952,053.48 × 388,088
  4. Step 4: Simplify right side
    689,894x = 369,480,530,946.24
  5. Step 5: Solve for x
    x = 369,480,530,946.24/689,894
  6. Step 6: Final answer
    x = 535,561.30

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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.