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Finding the Fourth Proportional to 760,215.76, 1,049,107.08 and 420,715.60

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Solution

The fourth proportional to 760,215.76, 1,049,107.08 and 420,715.60 is: 580,592.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    760,215.76 : 1,049,107.08 = 420,715.60 : x
  2. Step 2: Convert to fraction form
    760,215.76/1,049,107.08 = 420,715.60/x
  3. Step 3: Cross multiply
    760,215.76x = 1,049,107.08 × 420,715.60
  4. Step 4: Simplify right side
    760,215.76x = 441,375,714,626.45
  5. Step 5: Solve for x
    x = 441,375,714,626.45/760,215.76
  6. Step 6: Final answer
    x = 580,592.69

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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.