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Finding the Fourth Proportional to 565,485.12, 780,379.20 and 310,847.04

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Solution

The fourth proportional to 565,485.12, 780,379.20 and 310,847.04 is: 428,974.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    565,485.12 : 780,379.20 = 310,847.04 : x
  2. Step 2: Convert to fraction form
    565,485.12/780,379.20 = 310,847.04/x
  3. Step 3: Cross multiply
    565,485.12x = 780,379.20 × 310,847.04
  4. Step 4: Simplify right side
    565,485.12x = 242,578,564,397.57
  5. Step 5: Solve for x
    x = 242,578,564,397.57/565,485.12
  6. Step 6: Final answer
    x = 428,974.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.