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Finding the Fourth Proportional to 427,389.65, 589,812.29 and 243,655.39

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Solution

The fourth proportional to 427,389.65, 589,812.29 and 243,655.39 is: 336,252.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,389.65 : 589,812.29 = 243,655.39 : x
  2. Step 2: Convert to fraction form
    427,389.65/589,812.29 = 243,655.39/x
  3. Step 3: Cross multiply
    427,389.65x = 589,812.29 × 243,655.39
  4. Step 4: Simplify right side
    427,389.65x = 143,710,943,979.44
  5. Step 5: Solve for x
    x = 143,710,943,979.44/427,389.65
  6. Step 6: Final answer
    x = 336,252.75

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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.