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Finding the Fourth Proportional to 612,293.60, 918,221.70 and 212,947.40

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Solution

The fourth proportional to 612,293.60, 918,221.70 and 212,947.40 is: 319,345.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,293.60 : 918,221.70 = 212,947.40 : x
  2. Step 2: Convert to fraction form
    612,293.60/918,221.70 = 212,947.40/x
  3. Step 3: Cross multiply
    612,293.60x = 918,221.70 × 212,947.40
  4. Step 4: Simplify right side
    612,293.60x = 195,532,923,638.58
  5. Step 5: Solve for x
    x = 195,532,923,638.58/612,293.60
  6. Step 6: Final answer
    x = 319,345.04

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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.