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Finding the Fourth Proportional to 340,303.23, 510,454.85 and 90,978.75

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Solution

The fourth proportional to 340,303.23, 510,454.85 and 90,978.75 is: 136,468.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,303.23 : 510,454.85 = 90,978.75 : x
  2. Step 2: Convert to fraction form
    340,303.23/510,454.85 = 90,978.75/x
  3. Step 3: Cross multiply
    340,303.23x = 510,454.85 × 90,978.75
  4. Step 4: Simplify right side
    340,303.23x = 46,440,543,729.54
  5. Step 5: Solve for x
    x = 46,440,543,729.54/340,303.23
  6. Step 6: Final answer
    x = 136,468.13

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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.