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Finding the Fourth Proportional to 346,439.20, 519,658.80 and 253,127.20

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Solution

The fourth proportional to 346,439.20, 519,658.80 and 253,127.20 is: 379,690.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,439.20 : 519,658.80 = 253,127.20 : x
  2. Step 2: Convert to fraction form
    346,439.20/519,658.80 = 253,127.20/x
  3. Step 3: Cross multiply
    346,439.20x = 519,658.80 × 253,127.20
  4. Step 4: Simplify right side
    346,439.20x = 131,539,776,999.36
  5. Step 5: Solve for x
    x = 131,539,776,999.36/346,439.20
  6. Step 6: Final answer
    x = 379,690.80

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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.