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Finding the Fourth Proportional to 1,787,479.72, 2,466,733.60 and 971,690.45

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Solution

The fourth proportional to 1,787,479.72, 2,466,733.60 and 971,690.45 is: 1,340,939.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,787,479.72 : 2,466,733.60 = 971,690.45 : x
  2. Step 2: Convert to fraction form
    1,787,479.72/2,466,733.60 = 971,690.45/x
  3. Step 3: Cross multiply
    1,787,479.72x = 2,466,733.60 × 971,690.45
  4. Step 4: Simplify right side
    1,787,479.72x = 2,396,901,470,695.07
  5. Step 5: Solve for x
    x = 2,396,901,470,695.07/1,787,479.72
  6. Step 6: Final answer
    x = 1,340,939.12

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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.