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Finding the Fourth Proportional to 922,806.60, 1,384,404.30 and 390,053.40

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Solution

The fourth proportional to 922,806.60, 1,384,404.30 and 390,053.40 is: 585,162.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    922,806.60 : 1,384,404.30 = 390,053.40 : x
  2. Step 2: Convert to fraction form
    922,806.60/1,384,404.30 = 390,053.40/x
  3. Step 3: Cross multiply
    922,806.60x = 1,384,404.30 × 390,053.40
  4. Step 4: Simplify right side
    922,806.60x = 539,991,604,189.62
  5. Step 5: Solve for x
    x = 539,991,604,189.62/922,806.60
  6. Step 6: Final answer
    x = 585,162.27

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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.