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Finding the Fourth Proportional to 315,074.91, 472,682.63 and 90,417.84

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Solution

The fourth proportional to 315,074.91, 472,682.63 and 90,417.84 is: 135,646.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,074.91 : 472,682.63 = 90,417.84 : x
  2. Step 2: Convert to fraction form
    315,074.91/472,682.63 = 90,417.84/x
  3. Step 3: Cross multiply
    315,074.91x = 472,682.63 × 90,417.84
  4. Step 4: Simplify right side
    315,074.91x = 42,738,941,958.03
  5. Step 5: Solve for x
    x = 42,738,941,958.03/315,074.91
  6. Step 6: Final answer
    x = 135,646.92

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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.