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Finding the Fourth Proportional to 385,323.16, 531,733.62 and 215,553.64

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Solution

The fourth proportional to 385,323.16, 531,733.62 and 215,553.64 is: 297,457.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,323.16 : 531,733.62 = 215,553.64 : x
  2. Step 2: Convert to fraction form
    385,323.16/531,733.62 = 215,553.64/x
  3. Step 3: Cross multiply
    385,323.16x = 531,733.62 × 215,553.64
  4. Step 4: Simplify right side
    385,323.16x = 114,617,117,301.38
  5. Step 5: Solve for x
    x = 114,617,117,301.38/385,323.16
  6. Step 6: Final answer
    x = 297,457.12

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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.