Home / 430,582,513.40-645,432,870.90-211,896,510.20

Finding the Fourth Proportional to 430,582,513.40, 645,432,870.90 and 211,896,510.20

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Solution

The fourth proportional to 430,582,513.40, 645,432,870.90 and 211,896,510.20 is: 317,627,791.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,582,513.40 : 645,432,870.90 = 211,896,510.20 : x
  2. Step 2: Convert to fraction form
    430,582,513.40/645,432,870.90 = 211,896,510.20/x
  3. Step 3: Cross multiply
    430,582,513.40x = 645,432,870.90 × 211,896,510.20
  4. Step 4: Simplify right side
    430,582,513.40x = 136,764,972,912,077,120
  5. Step 5: Solve for x
    x = 136,764,972,912,077,120/430,582,513.40
  6. Step 6: Final answer
    x = 317,627,791.78

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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.