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Finding the Fourth Proportional to 1,325,430.22, 1,829,006.70 and 781,539.70

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Solution

The fourth proportional to 1,325,430.22, 1,829,006.70 and 781,539.70 is: 1,078,473.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,325,430.22 : 1,829,006.70 = 781,539.70 : x
  2. Step 2: Convert to fraction form
    1,325,430.22/1,829,006.70 = 781,539.70/x
  3. Step 3: Cross multiply
    1,325,430.22x = 1,829,006.70 × 781,539.70
  4. Step 4: Simplify right side
    1,325,430.22x = 1,429,441,347,615.99
  5. Step 5: Solve for x
    x = 1,429,441,347,615.99/1,325,430.22
  6. Step 6: Final answer
    x = 1,078,473.48

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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.