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Finding the Fourth Proportional to 369,108.80, 509,091.36 and 318,209.60

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Solution

The fourth proportional to 369,108.80, 509,091.36 and 318,209.60 is: 438,888.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    369,108.80 : 509,091.36 = 318,209.60 : x
  2. Step 2: Convert to fraction form
    369,108.80/509,091.36 = 318,209.60/x
  3. Step 3: Cross multiply
    369,108.80x = 509,091.36 × 318,209.60
  4. Step 4: Simplify right side
    369,108.80x = 161,997,758,029.06
  5. Step 5: Solve for x
    x = 161,997,758,029.06/369,108.80
  6. Step 6: Final answer
    x = 438,888.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.