Home / 430,582,505.40-645,432,858.90-211,896,502.20

Finding the Fourth Proportional to 430,582,505.40, 645,432,858.90 and 211,896,502.20

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Solution

The fourth proportional to 430,582,505.40, 645,432,858.90 and 211,896,502.20 is: 317,627,779.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,582,505.40 : 645,432,858.90 = 211,896,502.20 : x
  2. Step 2: Convert to fraction form
    430,582,505.40/645,432,858.90 = 211,896,502.20/x
  3. Step 3: Cross multiply
    430,582,505.40x = 645,432,858.90 × 211,896,502.20
  4. Step 4: Simplify right side
    430,582,505.40x = 136,764,965,205,856,128
  5. Step 5: Solve for x
    x = 136,764,965,205,856,128/430,582,505.40
  6. Step 6: Final answer
    x = 317,627,779.79

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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.