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Finding the Fourth Proportional to 390,734.40, 586,101.60 and 264,763.20

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Solution

The fourth proportional to 390,734.40, 586,101.60 and 264,763.20 is: 397,144.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,734.40 : 586,101.60 = 264,763.20 : x
  2. Step 2: Convert to fraction form
    390,734.40/586,101.60 = 264,763.20/x
  3. Step 3: Cross multiply
    390,734.40x = 586,101.60 × 264,763.20
  4. Step 4: Simplify right side
    390,734.40x = 155,178,135,141.12
  5. Step 5: Solve for x
    x = 155,178,135,141.12/390,734.40
  6. Step 6: Final answer
    x = 397,144.80

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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.