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Finding the Fourth Proportional to 556,382.20, 767,839.88 and 311,364.88

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Solution

The fourth proportional to 556,382.20, 767,839.88 and 311,364.88 is: 429,701.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,382.20 : 767,839.88 = 311,364.88 : x
  2. Step 2: Convert to fraction form
    556,382.20/767,839.88 = 311,364.88/x
  3. Step 3: Cross multiply
    556,382.20x = 767,839.88 × 311,364.88
  4. Step 4: Simplify right side
    556,382.20x = 239,078,372,095.41
  5. Step 5: Solve for x
    x = 239,078,372,095.41/556,382.20
  6. Step 6: Final answer
    x = 429,701.69

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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.