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Finding the Fourth Proportional to 345,876.31, 477,531.38 and 216,991.51

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Solution

The fourth proportional to 345,876.31, 477,531.38 and 216,991.51 is: 299,587.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,876.31 : 477,531.38 = 216,991.51 : x
  2. Step 2: Convert to fraction form
    345,876.31/477,531.38 = 216,991.51/x
  3. Step 3: Cross multiply
    345,876.31x = 477,531.38 × 216,991.51
  4. Step 4: Simplify right side
    345,876.31x = 103,620,254,567.23
  5. Step 5: Solve for x
    x = 103,620,254,567.23/345,876.31
  6. Step 6: Final answer
    x = 299,587.60

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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.