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Finding the Fourth Proportional to 345,465.90, 518,349.42 and 120,987.36

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Solution

The fourth proportional to 345,465.90, 518,349.42 and 120,987.36 is: 181,533.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,465.90 : 518,349.42 = 120,987.36 : x
  2. Step 2: Convert to fraction form
    345,465.90/518,349.42 = 120,987.36/x
  3. Step 3: Cross multiply
    345,465.90x = 518,349.42 × 120,987.36
  4. Step 4: Simplify right side
    345,465.90x = 62,713,727,883.33
  5. Step 5: Solve for x
    x = 62,713,727,883.33/345,465.90
  6. Step 6: Final answer
    x = 181,533.77

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1.5x scale

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.