Home / 430,605.32-645,973.60-220,172.18

Finding the Fourth Proportional to 430,605.32, 645,973.60 and 220,172.18

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Solution

The fourth proportional to 430,605.32, 645,973.60 and 220,172.18 is: 330,291.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,605.32 : 645,973.60 = 220,172.18 : x
  2. Step 2: Convert to fraction form
    430,605.32/645,973.60 = 220,172.18/x
  3. Step 3: Cross multiply
    430,605.32x = 645,973.60 × 220,172.18
  4. Step 4: Simplify right side
    430,605.32x = 142,225,415,734.45
  5. Step 5: Solve for x
    x = 142,225,415,734.45/430,605.32
  6. Step 6: Final answer
    x = 330,291.82

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1.5x scale

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.