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Finding the Fourth Proportional to 1,375,947.90, 1,899,707.40 and 893,886.96

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Solution

The fourth proportional to 1,375,947.90, 1,899,707.40 and 893,886.96 is: 1,234,148.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,375,947.90 : 1,899,707.40 = 893,886.96 : x
  2. Step 2: Convert to fraction form
    1,375,947.90/1,899,707.40 = 893,886.96/x
  3. Step 3: Cross multiply
    1,375,947.90x = 1,899,707.40 × 893,886.96
  4. Step 4: Simplify right side
    1,375,947.90x = 1,698,123,672,675.50
  5. Step 5: Solve for x
    x = 1,698,123,672,675.50/1,375,947.90
  6. Step 6: Final answer
    x = 1,234,148.24

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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.