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Finding the Fourth Proportional to 922,614.64, 1,383,980.32 and 390,036.40

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Solution

The fourth proportional to 922,614.64, 1,383,980.32 and 390,036.40 is: 585,079.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    922,614.64 : 1,383,980.32 = 390,036.40 : x
  2. Step 2: Convert to fraction form
    922,614.64/1,383,980.32 = 390,036.40/x
  3. Step 3: Cross multiply
    922,614.64x = 1,383,980.32 × 390,036.40
  4. Step 4: Simplify right side
    922,614.64x = 539,802,701,683.65
  5. Step 5: Solve for x
    x = 539,802,701,683.65/922,614.64
  6. Step 6: Final answer
    x = 585,079.27

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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.