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Finding the Fourth Proportional to 1,319,371.24, 1,820,904.03 and 738,815.45

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Solution

The fourth proportional to 1,319,371.24, 1,820,904.03 and 738,815.45 is: 1,019,661.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319,371.24 : 1,820,904.03 = 738,815.45 : x
  2. Step 2: Convert to fraction form
    1,319,371.24/1,820,904.03 = 738,815.45/x
  3. Step 3: Cross multiply
    1,319,371.24x = 1,820,904.03 × 738,815.45
  4. Step 4: Simplify right side
    1,319,371.24x = 1,345,312,017,532.67
  5. Step 5: Solve for x
    x = 1,345,312,017,532.67/1,319,371.24
  6. Step 6: Final answer
    x = 1,019,661.47

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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.