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Finding the Fourth Proportional to 660,396.50, 911,347.17 and 358,590.50

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Solution

The fourth proportional to 660,396.50, 911,347.17 and 358,590.50 is: 494,854.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,396.50 : 911,347.17 = 358,590.50 : x
  2. Step 2: Convert to fraction form
    660,396.50/911,347.17 = 358,590.50/x
  3. Step 3: Cross multiply
    660,396.50x = 911,347.17 × 358,590.50
  4. Step 4: Simplify right side
    660,396.50x = 326,800,437,363.89
  5. Step 5: Solve for x
    x = 326,800,437,363.89/660,396.50
  6. Step 6: Final answer
    x = 494,854.89

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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.