Home / 430,210.20-645,315.30-243,586.20

Finding the Fourth Proportional to 430,210.20, 645,315.30 and 243,586.20

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Solution

The fourth proportional to 430,210.20, 645,315.30 and 243,586.20 is: 365,379.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,210.20 : 645,315.30 = 243,586.20 : x
  2. Step 2: Convert to fraction form
    430,210.20/645,315.30 = 243,586.20/x
  3. Step 3: Cross multiply
    430,210.20x = 645,315.30 × 243,586.20
  4. Step 4: Simplify right side
    430,210.20x = 157,189,901,728.86
  5. Step 5: Solve for x
    x = 157,189,901,728.86/430,210.20
  6. Step 6: Final answer
    x = 365,379.30

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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.