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Finding the Fourth Proportional to 210,038,008.20, 315,057,012.30 and 210,038,008.20

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Solution

The fourth proportional to 210,038,008.20, 315,057,012.30 and 210,038,008.20 is: 315,057,012.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,038,008.20 : 315,057,012.30 = 210,038,008.20 : x
  2. Step 2: Convert to fraction form
    210,038,008.20/315,057,012.30 = 210,038,008.20/x
  3. Step 3: Cross multiply
    210,038,008.20x = 315,057,012.30 × 210,038,008.20
  4. Step 4: Simplify right side
    210,038,008.20x = 66,173,947,332,934,896
  5. Step 5: Solve for x
    x = 66,173,947,332,934,896/210,038,008.20
  6. Step 6: Final answer
    x = 315,057,012.30

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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.