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Finding the Fourth Proportional to 384,776.48, 530,990.70 and 215,010.60

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Solution

The fourth proportional to 384,776.48, 530,990.70 and 215,010.60 is: 296,714.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,776.48 : 530,990.70 = 215,010.60 : x
  2. Step 2: Convert to fraction form
    384,776.48/530,990.70 = 215,010.60/x
  3. Step 3: Cross multiply
    384,776.48x = 530,990.70 × 215,010.60
  4. Step 4: Simplify right side
    384,776.48x = 114,168,629,001.42
  5. Step 5: Solve for x
    x = 114,168,629,001.42/384,776.48
  6. Step 6: Final answer
    x = 296,714.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.