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Finding the Fourth Proportional to 1,868,479.55, 2,578,501.76 and 1,009,039.74

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Solution

The fourth proportional to 1,868,479.55, 2,578,501.76 and 1,009,039.74 is: 1,392,474.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,868,479.55 : 2,578,501.76 = 1,009,039.74 : x
  2. Step 2: Convert to fraction form
    1,868,479.55/2,578,501.76 = 1,009,039.74/x
  3. Step 3: Cross multiply
    1,868,479.55x = 2,578,501.76 × 1,009,039.74
  4. Step 4: Simplify right side
    1,868,479.55x = 2,601,810,740,454.74
  5. Step 5: Solve for x
    x = 2,601,810,740,454.74/1,868,479.55
  6. Step 6: Final answer
    x = 1,392,474.83

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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.