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Finding the Fourth Proportional to 326,783.80, 489,811.20 and 127,037.80

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Solution

The fourth proportional to 326,783.80, 489,811.20 and 127,037.80 is: 190,415.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,783.80 : 489,811.20 = 127,037.80 : x
  2. Step 2: Convert to fraction form
    326,783.80/489,811.20 = 127,037.80/x
  3. Step 3: Cross multiply
    326,783.80x = 489,811.20 × 127,037.80
  4. Step 4: Simplify right side
    326,783.80x = 62,224,537,263.36
  5. Step 5: Solve for x
    x = 62,224,537,263.36/326,783.80
  6. Step 6: Final answer
    x = 190,415.00

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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.