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Finding the Fourth Proportional to 390,883.40, 586,325.10 and 264,912.20

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Solution

The fourth proportional to 390,883.40, 586,325.10 and 264,912.20 is: 397,368.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,883.40 : 586,325.10 = 264,912.20 : x
  2. Step 2: Convert to fraction form
    390,883.40/586,325.10 = 264,912.20/x
  3. Step 3: Cross multiply
    390,883.40x = 586,325.10 × 264,912.20
  4. Step 4: Simplify right side
    390,883.40x = 155,324,672,156.22
  5. Step 5: Solve for x
    x = 155,324,672,156.22/390,883.40
  6. Step 6: Final answer
    x = 397,368.30

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1.5x scale

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.