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Finding the Fourth Proportional to 697,702.80, 962,830.08 and 391,736.64

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Solution

The fourth proportional to 697,702.80, 962,830.08 and 391,736.64 is: 540,596.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    697,702.80 : 962,830.08 = 391,736.64 : x
  2. Step 2: Convert to fraction form
    697,702.80/962,830.08 = 391,736.64/x
  3. Step 3: Cross multiply
    697,702.80x = 962,830.08 × 391,736.64
  4. Step 4: Simplify right side
    697,702.80x = 377,175,820,430.13
  5. Step 5: Solve for x
    x = 377,175,820,430.13/697,702.80
  6. Step 6: Final answer
    x = 540,596.68

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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.