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Finding the Fourth Proportional to 780,388.76, 1,169,679.54 and 358,779.80

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Solution

The fourth proportional to 780,388.76, 1,169,679.54 and 358,779.80 is: 537,754.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    780,388.76 : 1,169,679.54 = 358,779.80 : x
  2. Step 2: Convert to fraction form
    780,388.76/1,169,679.54 = 358,779.80/x
  3. Step 3: Cross multiply
    780,388.76x = 1,169,679.54 × 358,779.80
  4. Step 4: Simplify right side
    780,388.76x = 419,657,391,425.29
  5. Step 5: Solve for x
    x = 419,657,391,425.29/780,388.76
  6. Step 6: Final answer
    x = 537,754.27

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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.