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Finding the Fourth Proportional to 565,587.10, 780,490.29 and 310,936.42

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Solution

The fourth proportional to 565,587.10, 780,490.29 and 310,936.42 is: 429,081.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    565,587.10 : 780,490.29 = 310,936.42 : x
  2. Step 2: Convert to fraction form
    565,587.10/780,490.29 = 310,936.42/x
  3. Step 3: Cross multiply
    565,587.10x = 780,490.29 × 310,936.42
  4. Step 4: Simplify right side
    565,587.10x = 242,682,856,617.36
  5. Step 5: Solve for x
    x = 242,682,856,617.36/565,587.10
  6. Step 6: Final answer
    x = 429,081.32

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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.