Home / 939,288.52-1,407,811.78-512,931.70

Finding the Fourth Proportional to 939,288.52, 1,407,811.78 and 512,931.70

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Solution

The fourth proportional to 939,288.52, 1,407,811.78 and 512,931.70 is: 768,785.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    939,288.52 : 1,407,811.78 = 512,931.70 : x
  2. Step 2: Convert to fraction form
    939,288.52/1,407,811.78 = 512,931.70/x
  3. Step 3: Cross multiply
    939,288.52x = 1,407,811.78 × 512,931.70
  4. Step 4: Simplify right side
    939,288.52x = 722,111,289,595.43
  5. Step 5: Solve for x
    x = 722,111,289,595.43/939,288.52
  6. Step 6: Final answer
    x = 768,785.39

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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.