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Finding the Fourth Proportional to 862,328.60, 1,293,492.90 and 823,621.40

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Solution

The fourth proportional to 862,328.60, 1,293,492.90 and 823,621.40 is: 1,235,432.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    862,328.60 : 1,293,492.90 = 823,621.40 : x
  2. Step 2: Convert to fraction form
    862,328.60/1,293,492.90 = 823,621.40/x
  3. Step 3: Cross multiply
    862,328.60x = 1,293,492.90 × 823,621.40
  4. Step 4: Simplify right side
    862,328.60x = 1,065,348,433,188.06
  5. Step 5: Solve for x
    x = 1,065,348,433,188.06/862,328.60
  6. Step 6: Final answer
    x = 1,235,432.10

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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.