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Finding the Fourth Proportional to 612,689.20, 919,908.60 and 346,968.70

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Solution

The fourth proportional to 612,689.20, 919,908.60 and 346,968.70 is: 520,948.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,689.20 : 919,908.60 = 346,968.70 : x
  2. Step 2: Convert to fraction form
    612,689.20/919,908.60 = 346,968.70/x
  3. Step 3: Cross multiply
    612,689.20x = 919,908.60 × 346,968.70
  4. Step 4: Simplify right side
    612,689.20x = 319,179,491,060.82
  5. Step 5: Solve for x
    x = 319,179,491,060.82/612,689.20
  6. Step 6: Final answer
    x = 520,948.45

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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.