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Finding the Fourth Proportional to 718,266, 990,496.92 and 609,666.90

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Solution

The fourth proportional to 718,266, 990,496.92 and 609,666.90 is: 840,737.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,266 : 990,496.92 = 609,666.90 : x
  2. Step 2: Convert to fraction form
    718,266/990,496.92 = 609,666.90/x
  3. Step 3: Cross multiply
    718,266x = 990,496.92 × 609,666.90
  4. Step 4: Simplify right side
    718,266x = 603,873,186,675.95
  5. Step 5: Solve for x
    x = 603,873,186,675.95/718,266
  6. Step 6: Final answer
    x = 840,737.54

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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.