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Finding the Fourth Proportional to 1,095,899.40, 1,643,849.10 and 717,985.80

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Solution

The fourth proportional to 1,095,899.40, 1,643,849.10 and 717,985.80 is: 1,076,978.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,095,899.40 : 1,643,849.10 = 717,985.80 : x
  2. Step 2: Convert to fraction form
    1,095,899.40/1,643,849.10 = 717,985.80/x
  3. Step 3: Cross multiply
    1,095,899.40x = 1,643,849.10 × 717,985.80
  4. Step 4: Simplify right side
    1,095,899.40x = 1,180,260,311,142.78
  5. Step 5: Solve for x
    x = 1,180,260,311,142.78/1,095,899.40
  6. Step 6: Final answer
    x = 1,076,978.70

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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.