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Finding the Fourth Proportional to 642,870.15, 887,171.58 and 352,475.64

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Solution

The fourth proportional to 642,870.15, 887,171.58 and 352,475.64 is: 486,422.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,870.15 : 887,171.58 = 352,475.64 : x
  2. Step 2: Convert to fraction form
    642,870.15/887,171.58 = 352,475.64/x
  3. Step 3: Cross multiply
    642,870.15x = 887,171.58 × 352,475.64
  4. Step 4: Simplify right side
    642,870.15x = 312,706,370,450.31
  5. Step 5: Solve for x
    x = 312,706,370,450.31/642,870.15
  6. Step 6: Final answer
    x = 486,422.29

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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.