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Finding the Fourth Proportional to 492,429.10, 738,643.65 and 430,221.10

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Solution

The fourth proportional to 492,429.10, 738,643.65 and 430,221.10 is: 645,331.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,429.10 : 738,643.65 = 430,221.10 : x
  2. Step 2: Convert to fraction form
    492,429.10/738,643.65 = 430,221.10/x
  3. Step 3: Cross multiply
    492,429.10x = 738,643.65 × 430,221.10
  4. Step 4: Simplify right side
    492,429.10x = 317,780,083,611.02
  5. Step 5: Solve for x
    x = 317,780,083,611.02/492,429.10
  6. Step 6: Final answer
    x = 645,331.65

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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.