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Finding the Fourth Proportional to 390,043.20, 583,898.40 and 366,974.40

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Solution

The fourth proportional to 390,043.20, 583,898.40 and 366,974.40 is: 549,364.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,043.20 : 583,898.40 = 366,974.40 : x
  2. Step 2: Convert to fraction form
    390,043.20/583,898.40 = 366,974.40/x
  3. Step 3: Cross multiply
    390,043.20x = 583,898.40 × 366,974.40
  4. Step 4: Simplify right side
    390,043.20x = 214,275,765,000.96
  5. Step 5: Solve for x
    x = 214,275,765,000.96/390,043.20
  6. Step 6: Final answer
    x = 549,364.19

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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.