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Finding the Fourth Proportional to 384,155.40, 530,147.70 and 214,421.16

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Solution

The fourth proportional to 384,155.40, 530,147.70 and 214,421.16 is: 295,908.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,155.40 : 530,147.70 = 214,421.16 : x
  2. Step 2: Convert to fraction form
    384,155.40/530,147.70 = 214,421.16/x
  3. Step 3: Cross multiply
    384,155.40x = 530,147.70 × 214,421.16
  4. Step 4: Simplify right side
    384,155.40x = 113,674,884,805.33
  5. Step 5: Solve for x
    x = 113,674,884,805.33/384,155.40
  6. Step 6: Final answer
    x = 295,908.60

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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.