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Finding the Fourth Proportional to 388,971.56, 536,779.95 and 210,123.56

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Solution

The fourth proportional to 388,971.56, 536,779.95 and 210,123.56 is: 289,970.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,971.56 : 536,779.95 = 210,123.56 : x
  2. Step 2: Convert to fraction form
    388,971.56/536,779.95 = 210,123.56/x
  3. Step 3: Cross multiply
    388,971.56x = 536,779.95 × 210,123.56
  4. Step 4: Simplify right side
    388,971.56x = 112,790,114,030.62
  5. Step 5: Solve for x
    x = 112,790,114,030.62/388,971.56
  6. Step 6: Final answer
    x = 289,970.08

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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.