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Finding the Fourth Proportional to 388,893, 536,672.70 and 210,045

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Solution

The fourth proportional to 388,893, 536,672.70 and 210,045 is: 289,862.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,893 : 536,672.70 = 210,045 : x
  2. Step 2: Convert to fraction form
    388,893/536,672.70 = 210,045/x
  3. Step 3: Cross multiply
    388,893x = 536,672.70 × 210,045
  4. Step 4: Simplify right side
    388,893x = 112,725,417,271.50
  5. Step 5: Solve for x
    x = 112,725,417,271.50/388,893
  6. Step 6: Final answer
    x = 289,862.29

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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.