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Finding the Fourth Proportional to 806,656.80, 1,209,985.20 and 696,064.80

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Solution

The fourth proportional to 806,656.80, 1,209,985.20 and 696,064.80 is: 1,044,097.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    806,656.80 : 1,209,985.20 = 696,064.80 : x
  2. Step 2: Convert to fraction form
    806,656.80/1,209,985.20 = 696,064.80/x
  3. Step 3: Cross multiply
    806,656.80x = 1,209,985.20 × 696,064.80
  4. Step 4: Simplify right side
    806,656.80x = 842,228,106,240.96
  5. Step 5: Solve for x
    x = 842,228,106,240.96/806,656.80
  6. Step 6: Final answer
    x = 1,044,097.20

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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.