Home / 430,412.10-645,618.15-130,890.30

Finding the Fourth Proportional to 430,412.10, 645,618.15 and 130,890.30

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Solution

The fourth proportional to 430,412.10, 645,618.15 and 130,890.30 is: 196,335.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,412.10 : 645,618.15 = 130,890.30 : x
  2. Step 2: Convert to fraction form
    430,412.10/645,618.15 = 130,890.30/x
  3. Step 3: Cross multiply
    430,412.10x = 645,618.15 × 130,890.30
  4. Step 4: Simplify right side
    430,412.10x = 84,505,153,338.95
  5. Step 5: Solve for x
    x = 84,505,153,338.95/430,412.10
  6. Step 6: Final answer
    x = 196,335.45

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Similar ratio
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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.