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Finding the Fourth Proportional to 326,043.40, 489,065.10 and 186,075.40

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Solution

The fourth proportional to 326,043.40, 489,065.10 and 186,075.40 is: 279,113.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,043.40 : 489,065.10 = 186,075.40 : x
  2. Step 2: Convert to fraction form
    326,043.40/489,065.10 = 186,075.40/x
  3. Step 3: Cross multiply
    326,043.40x = 489,065.10 × 186,075.40
  4. Step 4: Simplify right side
    326,043.40x = 91,002,984,108.54
  5. Step 5: Solve for x
    x = 91,002,984,108.54/326,043.40
  6. Step 6: Final answer
    x = 279,113.10

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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.