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Finding the Fourth Proportional to 660,993.40, 912,336.78 and 374,684.32

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Solution

The fourth proportional to 660,993.40, 912,336.78 and 374,684.32 is: 517,158.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,993.40 : 912,336.78 = 374,684.32 : x
  2. Step 2: Convert to fraction form
    660,993.40/912,336.78 = 374,684.32/x
  3. Step 3: Cross multiply
    660,993.40x = 912,336.78 × 374,684.32
  4. Step 4: Simplify right side
    660,993.40x = 341,838,286,025.29
  5. Step 5: Solve for x
    x = 341,838,286,025.29/660,993.40
  6. Step 6: Final answer
    x = 517,158.40

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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.