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Finding the Fourth Proportional to 390,933.60, 586,400.40 and 266,517.60

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Solution

The fourth proportional to 390,933.60, 586,400.40 and 266,517.60 is: 399,776.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,933.60 : 586,400.40 = 266,517.60 : x
  2. Step 2: Convert to fraction form
    390,933.60/586,400.40 = 266,517.60/x
  3. Step 3: Cross multiply
    390,933.60x = 586,400.40 × 266,517.60
  4. Step 4: Simplify right side
    390,933.60x = 156,286,027,247.04
  5. Step 5: Solve for x
    x = 156,286,027,247.04/390,933.60
  6. Step 6: Final answer
    x = 399,776.40

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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.