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Finding the Fourth Proportional to 912,993.77, 1,259,989.72 and 510,585.77

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Solution

The fourth proportional to 912,993.77, 1,259,989.72 and 510,585.77 is: 704,640.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    912,993.77 : 1,259,989.72 = 510,585.77 : x
  2. Step 2: Convert to fraction form
    912,993.77/1,259,989.72 = 510,585.77/x
  3. Step 3: Cross multiply
    912,993.77x = 1,259,989.72 × 510,585.77
  4. Step 4: Simplify right side
    912,993.77x = 643,332,821,378.28
  5. Step 5: Solve for x
    x = 643,332,821,378.28/912,993.77
  6. Step 6: Final answer
    x = 704,640.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.