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Finding the Fourth Proportional to 612,385.57, 918,599.07 and 213,029.80

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Solution

The fourth proportional to 612,385.57, 918,599.07 and 213,029.80 is: 319,551.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,385.57 : 918,599.07 = 213,029.80 : x
  2. Step 2: Convert to fraction form
    612,385.57/918,599.07 = 213,029.80/x
  3. Step 3: Cross multiply
    612,385.57x = 918,599.07 × 213,029.80
  4. Step 4: Simplify right side
    612,385.57x = 195,688,971,569.29
  5. Step 5: Solve for x
    x = 195,688,971,569.29/612,385.57
  6. Step 6: Final answer
    x = 319,551.90

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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.