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Finding the Fourth Proportional to 877,311, 1,210,690.80 and 474,903

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Solution

The fourth proportional to 877,311, 1,210,690.80 and 474,903 is: 655,367.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    877,311 : 1,210,690.80 = 474,903 : x
  2. Step 2: Convert to fraction form
    877,311/1,210,690.80 = 474,903/x
  3. Step 3: Cross multiply
    877,311x = 1,210,690.80 × 474,903
  4. Step 4: Simplify right side
    877,311x = 574,960,692,992.40
  5. Step 5: Solve for x
    x = 574,960,692,992.40/877,311
  6. Step 6: Final answer
    x = 655,367.02

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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.