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Finding the Fourth Proportional to 710,756.40, 1,065,745.80 and 289,556.40

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Solution

The fourth proportional to 710,756.40, 1,065,745.80 and 289,556.40 is: 434,176.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,756.40 : 1,065,745.80 = 289,556.40 : x
  2. Step 2: Convert to fraction form
    710,756.40/1,065,745.80 = 289,556.40/x
  3. Step 3: Cross multiply
    710,756.40x = 1,065,745.80 × 289,556.40
  4. Step 4: Simplify right side
    710,756.40x = 308,593,517,163.12
  5. Step 5: Solve for x
    x = 308,593,517,163.12/710,756.40
  6. Step 6: Final answer
    x = 434,176.21

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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.