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Finding the Fourth Proportional to 384,387.48, 530,405.28 and 214,628.76

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Solution

The fourth proportional to 384,387.48, 530,405.28 and 214,628.76 is: 296,160.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,387.48 : 530,405.28 = 214,628.76 : x
  2. Step 2: Convert to fraction form
    384,387.48/530,405.28 = 214,628.76/x
  3. Step 3: Cross multiply
    384,387.48x = 530,405.28 × 214,628.76
  4. Step 4: Simplify right side
    384,387.48x = 113,840,227,543.85
  5. Step 5: Solve for x
    x = 113,840,227,543.85/384,387.48
  6. Step 6: Final answer
    x = 296,160.08

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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.