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Finding the Fourth Proportional to 1,863,978.48, 2,569,189.32 and 1,319,415.48

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Solution

The fourth proportional to 1,863,978.48, 2,569,189.32 and 1,319,415.48 is: 1,818,598.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,863,978.48 : 2,569,189.32 = 1,319,415.48 : x
  2. Step 2: Convert to fraction form
    1,863,978.48/2,569,189.32 = 1,319,415.48/x
  3. Step 3: Cross multiply
    1,863,978.48x = 2,569,189.32 × 1,319,415.48
  4. Step 4: Simplify right side
    1,863,978.48x = 3,389,828,159,858.67
  5. Step 5: Solve for x
    x = 3,389,828,159,858.67/1,863,978.48
  6. Step 6: Final answer
    x = 1,818,598.33

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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.