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Finding the Fourth Proportional to 216,459.47, 298,520.64 and 135,894.51

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Solution

The fourth proportional to 216,459.47, 298,520.64 and 135,894.51 is: 187,412.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,459.47 : 298,520.64 = 135,894.51 : x
  2. Step 2: Convert to fraction form
    216,459.47/298,520.64 = 135,894.51/x
  3. Step 3: Cross multiply
    216,459.47x = 298,520.64 × 135,894.51
  4. Step 4: Simplify right side
    216,459.47x = 40,567,316,097.69
  5. Step 5: Solve for x
    x = 40,567,316,097.69/216,459.47
  6. Step 6: Final answer
    x = 187,412.99

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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.