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Finding the Fourth Proportional to 519,315.40, 778,896.30 and 145,376.20

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Solution

The fourth proportional to 519,315.40, 778,896.30 and 145,376.20 is: 218,042.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,315.40 : 778,896.30 = 145,376.20 : x
  2. Step 2: Convert to fraction form
    519,315.40/778,896.30 = 145,376.20/x
  3. Step 3: Cross multiply
    519,315.40x = 778,896.30 × 145,376.20
  4. Step 4: Simplify right side
    519,315.40x = 113,232,984,288.06
  5. Step 5: Solve for x
    x = 113,232,984,288.06/519,315.40
  6. Step 6: Final answer
    x = 218,042.80

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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.