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Finding the Fourth Proportional to 427,390.65, 589,813.67 and 243,656.39

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Solution

The fourth proportional to 427,390.65, 589,813.67 and 243,656.39 is: 336,254.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,390.65 : 589,813.67 = 243,656.39 : x
  2. Step 2: Convert to fraction form
    427,390.65/589,813.67 = 243,656.39/x
  3. Step 3: Cross multiply
    427,390.65x = 589,813.67 × 243,656.39
  4. Step 4: Simplify right side
    427,390.65x = 143,711,869,604.85
  5. Step 5: Solve for x
    x = 143,711,869,604.85/427,390.65
  6. Step 6: Final answer
    x = 336,254.13

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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.