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Finding the Fourth Proportional to 1,038,981.45, 1,554,927.41 and 870,691.80

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Solution

The fourth proportional to 1,038,981.45, 1,554,927.41 and 870,691.80 is: 1,303,067.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,038,981.45 : 1,554,927.41 = 870,691.80 : x
  2. Step 2: Convert to fraction form
    1,038,981.45/1,554,927.41 = 870,691.80/x
  3. Step 3: Cross multiply
    1,038,981.45x = 1,554,927.41 × 870,691.80
  4. Step 4: Simplify right side
    1,038,981.45x = 1,353,862,541,128.78
  5. Step 5: Solve for x
    x = 1,353,862,541,128.78/1,038,981.45
  6. Step 6: Final answer
    x = 1,303,067.10

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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.