Home / 1,121,420.68-1,680,409.02-761,123.56

Finding the Fourth Proportional to 1,121,420.68, 1,680,409.02 and 761,123.56

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Solution

The fourth proportional to 1,121,420.68, 1,680,409.02 and 761,123.56 is: 1,140,516.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121,420.68 : 1,680,409.02 = 761,123.56 : x
  2. Step 2: Convert to fraction form
    1,121,420.68/1,680,409.02 = 761,123.56/x
  3. Step 3: Cross multiply
    1,121,420.68x = 1,680,409.02 × 761,123.56
  4. Step 4: Simplify right side
    1,121,420.68x = 1,278,998,895,558.51
  5. Step 5: Solve for x
    x = 1,278,998,895,558.51/1,121,420.68
  6. Step 6: Final answer
    x = 1,140,516.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.