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Finding the Fourth Proportional to 922,990.64, 1,384,632.34 and 390,515.63

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Solution

The fourth proportional to 922,990.64, 1,384,632.34 and 390,515.63 is: 585,835.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    922,990.64 : 1,384,632.34 = 390,515.63 : x
  2. Step 2: Convert to fraction form
    922,990.64/1,384,632.34 = 390,515.63/x
  3. Step 3: Cross multiply
    922,990.64x = 1,384,632.34 × 390,515.63
  4. Step 4: Simplify right side
    922,990.64x = 540,720,562,674.02
  5. Step 5: Solve for x
    x = 540,720,562,674.02/922,990.64
  6. Step 6: Final answer
    x = 585,835.37

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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.