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Finding the Fourth Proportional to 390,557.46, 585,914.55 and 165,916.11

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Solution

The fourth proportional to 390,557.46, 585,914.55 and 165,916.11 is: 248,907.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,557.46 : 585,914.55 = 165,916.11 : x
  2. Step 2: Convert to fraction form
    390,557.46/585,914.55 = 165,916.11/x
  3. Step 3: Cross multiply
    390,557.46x = 585,914.55 × 165,916.11
  4. Step 4: Simplify right side
    390,557.46x = 97,212,662,928.40
  5. Step 5: Solve for x
    x = 97,212,662,928.40/390,557.46
  6. Step 6: Final answer
    x = 248,907.45

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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.