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Finding the Fourth Proportional to 1,980,881.76, 2,970,928.80 and 969,569.28

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Solution

The fourth proportional to 1,980,881.76, 2,970,928.80 and 969,569.28 is: 1,454,161.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,980,881.76 : 2,970,928.80 = 969,569.28 : x
  2. Step 2: Convert to fraction form
    1,980,881.76/2,970,928.80 = 969,569.28/x
  3. Step 3: Cross multiply
    1,980,881.76x = 2,970,928.80 × 969,569.28
  4. Step 4: Simplify right side
    1,980,881.76x = 2,880,521,297,547.26
  5. Step 5: Solve for x
    x = 2,880,521,297,547.26/1,980,881.76
  6. Step 6: Final answer
    x = 1,454,161.15

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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.