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Finding the Fourth Proportional to 560,667.90, 774,733.80 and 399,242.70

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Solution

The fourth proportional to 560,667.90, 774,733.80 and 399,242.70 is: 551,675.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    560,667.90 : 774,733.80 = 399,242.70 : x
  2. Step 2: Convert to fraction form
    560,667.90/774,733.80 = 399,242.70/x
  3. Step 3: Cross multiply
    560,667.90x = 774,733.80 × 399,242.70
  4. Step 4: Simplify right side
    560,667.90x = 309,306,814,093.26
  5. Step 5: Solve for x
    x = 309,306,814,093.26/560,667.90
  6. Step 6: Final answer
    x = 551,675.62

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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.