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Finding the Fourth Proportional to 579,346.80, 869,106.60 and 205,340.40

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Solution

The fourth proportional to 579,346.80, 869,106.60 and 205,340.40 is: 308,041.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,346.80 : 869,106.60 = 205,340.40 : x
  2. Step 2: Convert to fraction form
    579,346.80/869,106.60 = 205,340.40/x
  3. Step 3: Cross multiply
    579,346.80x = 869,106.60 × 205,340.40
  4. Step 4: Simplify right side
    579,346.80x = 178,462,696,886.64
  5. Step 5: Solve for x
    x = 178,462,696,886.64/579,346.80
  6. Step 6: Final answer
    x = 308,041.22

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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.