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Finding the Fourth Proportional to 802,069.12, 1,106,807.68 and 439,420.80

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Solution

The fourth proportional to 802,069.12, 1,106,807.68 and 439,420.80 is: 606,374.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    802,069.12 : 1,106,807.68 = 439,420.80 : x
  2. Step 2: Convert to fraction form
    802,069.12/1,106,807.68 = 439,420.80/x
  3. Step 3: Cross multiply
    802,069.12x = 1,106,807.68 × 439,420.80
  4. Step 4: Simplify right side
    802,069.12x = 486,354,316,191.74
  5. Step 5: Solve for x
    x = 486,354,316,191.74/802,069.12
  6. Step 6: Final answer
    x = 606,374.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.