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Finding the Fourth Proportional to 340,345.56, 510,479.64 and 91,047

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Solution

The fourth proportional to 340,345.56, 510,479.64 and 91,047 is: 136,560.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,345.56 : 510,479.64 = 91,047 : x
  2. Step 2: Convert to fraction form
    340,345.56/510,479.64 = 91,047/x
  3. Step 3: Cross multiply
    340,345.56x = 510,479.64 × 91,047
  4. Step 4: Simplify right side
    340,345.56x = 46,477,639,783.08
  5. Step 5: Solve for x
    x = 46,477,639,783.08/340,345.56
  6. Step 6: Final answer
    x = 136,560.15

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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.