Home / 430,245.60-645,368.40-311,359.20

Finding the Fourth Proportional to 430,245.60, 645,368.40 and 311,359.20

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Solution

The fourth proportional to 430,245.60, 645,368.40 and 311,359.20 is: 467,038.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,245.60 : 645,368.40 = 311,359.20 : x
  2. Step 2: Convert to fraction form
    430,245.60/645,368.40 = 311,359.20/x
  3. Step 3: Cross multiply
    430,245.60x = 645,368.40 × 311,359.20
  4. Step 4: Simplify right side
    430,245.60x = 200,941,388,729.28
  5. Step 5: Solve for x
    x = 200,941,388,729.28/430,245.60
  6. Step 6: Final answer
    x = 467,038.80

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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.