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Finding the Fourth Proportional to 315,897.84, 473,776.89 and 91,209.51

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Solution

The fourth proportional to 315,897.84, 473,776.89 and 91,209.51 is: 136,794.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,897.84 : 473,776.89 = 91,209.51 : x
  2. Step 2: Convert to fraction form
    315,897.84/473,776.89 = 91,209.51/x
  3. Step 3: Cross multiply
    315,897.84x = 473,776.89 × 91,209.51
  4. Step 4: Simplify right side
    315,897.84x = 43,212,957,986.22
  5. Step 5: Solve for x
    x = 43,212,957,986.22/315,897.84
  6. Step 6: Final answer
    x = 136,794.09

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1.5x scale

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.