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Finding the Fourth Proportional to 922,897.10, 1,384,540.05 and 390,143.90

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Solution

The fourth proportional to 922,897.10, 1,384,540.05 and 390,143.90 is: 585,298.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    922,897.10 : 1,384,540.05 = 390,143.90 : x
  2. Step 2: Convert to fraction form
    922,897.10/1,384,540.05 = 390,143.90/x
  3. Step 3: Cross multiply
    922,897.10x = 1,384,540.05 × 390,143.90
  4. Step 4: Simplify right side
    922,897.10x = 540,169,854,813.20
  5. Step 5: Solve for x
    x = 540,169,854,813.20/922,897.10
  6. Step 6: Final answer
    x = 585,298.03

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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.