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Finding the Fourth Proportional to 761,940, 1,142,779.32 and 357,173.28

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Solution

The fourth proportional to 761,940, 1,142,779.32 and 357,173.28 is: 535,698.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    761,940 : 1,142,779.32 = 357,173.28 : x
  2. Step 2: Convert to fraction form
    761,940/1,142,779.32 = 357,173.28/x
  3. Step 3: Cross multiply
    761,940x = 1,142,779.32 × 357,173.28
  4. Step 4: Simplify right side
    761,940x = 408,170,238,040.57
  5. Step 5: Solve for x
    x = 408,170,238,040.57/761,940
  6. Step 6: Final answer
    x = 535,698.66

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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.