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Finding the Fourth Proportional to 626,895.83, 865,118 and 340,420.70

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Solution

The fourth proportional to 626,895.83, 865,118 and 340,420.70 is: 469,781.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,895.83 : 865,118 = 340,420.70 : x
  2. Step 2: Convert to fraction form
    626,895.83/865,118 = 340,420.70/x
  3. Step 3: Cross multiply
    626,895.83x = 865,118 × 340,420.70
  4. Step 4: Simplify right side
    626,895.83x = 294,504,075,142.60
  5. Step 5: Solve for x
    x = 294,504,075,142.60/626,895.83
  6. Step 6: Final answer
    x = 469,781.52

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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.