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Finding the Fourth Proportional to 346,987.20, 520,480.80 and 157,374.30

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Solution

The fourth proportional to 346,987.20, 520,480.80 and 157,374.30 is: 236,061.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,987.20 : 520,480.80 = 157,374.30 : x
  2. Step 2: Convert to fraction form
    346,987.20/520,480.80 = 157,374.30/x
  3. Step 3: Cross multiply
    346,987.20x = 520,480.80 × 157,374.30
  4. Step 4: Simplify right side
    346,987.20x = 81,910,301,563.44
  5. Step 5: Solve for x
    x = 81,910,301,563.44/346,987.20
  6. Step 6: Final answer
    x = 236,061.45

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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.