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Finding the Fourth Proportional to 565,618.64, 780,555.72 and 310,985.84

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Solution

The fourth proportional to 565,618.64, 780,555.72 and 310,985.84 is: 429,161.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    565,618.64 : 780,555.72 = 310,985.84 : x
  2. Step 2: Convert to fraction form
    565,618.64/780,555.72 = 310,985.84/x
  3. Step 3: Cross multiply
    565,618.64x = 780,555.72 × 310,985.84
  4. Step 4: Simplify right side
    565,618.64x = 242,741,776,251.01
  5. Step 5: Solve for x
    x = 242,741,776,251.01/565,618.64
  6. Step 6: Final answer
    x = 429,161.56

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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.