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Finding the Fourth Proportional to 483,673.76, 725,509.70 and 128,687.77

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Solution

The fourth proportional to 483,673.76, 725,509.70 and 128,687.77 is: 193,031.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,673.76 : 725,509.70 = 128,687.77 : x
  2. Step 2: Convert to fraction form
    483,673.76/725,509.70 = 128,687.77/x
  3. Step 3: Cross multiply
    483,673.76x = 725,509.70 × 128,687.77
  4. Step 4: Simplify right side
    483,673.76x = 93,364,225,406.37
  5. Step 5: Solve for x
    x = 93,364,225,406.37/483,673.76
  6. Step 6: Final answer
    x = 193,031.40

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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.