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Finding the Fourth Proportional to 210,714.30, 315,629.85 and 98,490.30

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Solution

The fourth proportional to 210,714.30, 315,629.85 and 98,490.30 is: 147,529.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,714.30 : 315,629.85 = 98,490.30 : x
  2. Step 2: Convert to fraction form
    210,714.30/315,629.85 = 98,490.30/x
  3. Step 3: Cross multiply
    210,714.30x = 315,629.85 × 98,490.30
  4. Step 4: Simplify right side
    210,714.30x = 31,086,478,615.46
  5. Step 5: Solve for x
    x = 31,086,478,615.46/210,714.30
  6. Step 6: Final answer
    x = 147,529.04

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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.