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Finding the Fourth Proportional to 353,421.96, 530,130.28 and 143,056.84

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Solution

The fourth proportional to 353,421.96, 530,130.28 and 143,056.84 is: 214,584.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,421.96 : 530,130.28 = 143,056.84 : x
  2. Step 2: Convert to fraction form
    353,421.96/530,130.28 = 143,056.84/x
  3. Step 3: Cross multiply
    353,421.96x = 530,130.28 × 143,056.84
  4. Step 4: Simplify right side
    353,421.96x = 75,838,762,645.12
  5. Step 5: Solve for x
    x = 75,838,762,645.12/353,421.96
  6. Step 6: Final answer
    x = 214,584.18

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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.