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Finding the Fourth Proportional to 760,405.71, 1,049,326.86 and 420,853.71

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Solution

The fourth proportional to 760,405.71, 1,049,326.86 and 420,853.71 is: 580,759.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    760,405.71 : 1,049,326.86 = 420,853.71 : x
  2. Step 2: Convert to fraction form
    760,405.71/1,049,326.86 = 420,853.71/x
  3. Step 3: Cross multiply
    760,405.71x = 1,049,326.86 × 420,853.71
  4. Step 4: Simplify right side
    760,405.71x = 441,613,102,033.65
  5. Step 5: Solve for x
    x = 441,613,102,033.65/760,405.71
  6. Step 6: Final answer
    x = 580,759.84

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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.