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Finding the Fourth Proportional to 806,646.40, 1,209,969.60 and 745,820.80

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Solution

The fourth proportional to 806,646.40, 1,209,969.60 and 745,820.80 is: 1,118,731.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    806,646.40 : 1,209,969.60 = 745,820.80 : x
  2. Step 2: Convert to fraction form
    806,646.40/1,209,969.60 = 745,820.80/x
  3. Step 3: Cross multiply
    806,646.40x = 1,209,969.60 × 745,820.80
  4. Step 4: Simplify right side
    806,646.40x = 902,420,495,047.68
  5. Step 5: Solve for x
    x = 902,420,495,047.68/806,646.40
  6. Step 6: Final answer
    x = 1,118,731.20

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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.