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Finding the Fourth Proportional to 806,720.40, 1,210,080.60 and 745,894.80

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Solution

The fourth proportional to 806,720.40, 1,210,080.60 and 745,894.80 is: 1,118,842.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    806,720.40 : 1,210,080.60 = 745,894.80 : x
  2. Step 2: Convert to fraction form
    806,720.40/1,210,080.60 = 745,894.80/x
  3. Step 3: Cross multiply
    806,720.40x = 1,210,080.60 × 745,894.80
  4. Step 4: Simplify right side
    806,720.40x = 902,592,827,120.88
  5. Step 5: Solve for x
    x = 902,592,827,120.88/806,720.40
  6. Step 6: Final answer
    x = 1,118,842.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.