Home / 487,183.11-727,018.79-428,145.95

Finding the Fourth Proportional to 487,183.11, 727,018.79 and 428,145.95

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Solution

The fourth proportional to 487,183.11, 727,018.79 and 428,145.95 is: 638,918.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,183.11 : 727,018.79 = 428,145.95 : x
  2. Step 2: Convert to fraction form
    487,183.11/727,018.79 = 428,145.95/x
  3. Step 3: Cross multiply
    487,183.11x = 727,018.79 × 428,145.95
  4. Step 4: Simplify right side
    487,183.11x = 311,270,152,597.54
  5. Step 5: Solve for x
    x = 311,270,152,597.54/487,183.11
  6. Step 6: Final answer
    x = 638,918.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.