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Finding the Fourth Proportional to 390,865.77, 586,384.72 and 222,465.35

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Solution

The fourth proportional to 390,865.77, 586,384.72 and 222,465.35 is: 333,747.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,865.77 : 586,384.72 = 222,465.35 : x
  2. Step 2: Convert to fraction form
    390,865.77/586,384.72 = 222,465.35/x
  3. Step 3: Cross multiply
    390,865.77x = 586,384.72 × 222,465.35
  4. Step 4: Simplify right side
    390,865.77x = 130,450,282,879.25
  5. Step 5: Solve for x
    x = 130,450,282,879.25/390,865.77
  6. Step 6: Final answer
    x = 333,747.01

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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.