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Finding the Fourth Proportional to 644,716, 889,690.50 and 358,228.72

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Solution

The fourth proportional to 644,716, 889,690.50 and 358,228.72 is: 494,345.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,716 : 889,690.50 = 358,228.72 : x
  2. Step 2: Convert to fraction form
    644,716/889,690.50 = 358,228.72/x
  3. Step 3: Cross multiply
    644,716x = 889,690.50 × 358,228.72
  4. Step 4: Simplify right side
    644,716x = 318,712,689,011.16
  5. Step 5: Solve for x
    x = 318,712,689,011.16/644,716
  6. Step 6: Final answer
    x = 494,345.87

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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.