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Finding the Fourth Proportional to 1,531,603.57, 2,113,811.10 and 878,484.37

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Solution

The fourth proportional to 1,531,603.57, 2,113,811.10 and 878,484.37 is: 1,212,422.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,531,603.57 : 2,113,811.10 = 878,484.37 : x
  2. Step 2: Convert to fraction form
    1,531,603.57/2,113,811.10 = 878,484.37/x
  3. Step 3: Cross multiply
    1,531,603.57x = 2,113,811.10 × 878,484.37
  4. Step 4: Simplify right side
    1,531,603.57x = 1,856,950,012,482.51
  5. Step 5: Solve for x
    x = 1,856,950,012,482.51/1,531,603.57
  6. Step 6: Final answer
    x = 1,212,422.10

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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.