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Finding the Fourth Proportional to 608,615.80, 912,923.70 and 308,980.60

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Solution

The fourth proportional to 608,615.80, 912,923.70 and 308,980.60 is: 463,470.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,615.80 : 912,923.70 = 308,980.60 : x
  2. Step 2: Convert to fraction form
    608,615.80/912,923.70 = 308,980.60/x
  3. Step 3: Cross multiply
    608,615.80x = 912,923.70 × 308,980.60
  4. Step 4: Simplify right side
    608,615.80x = 282,075,712,580.22
  5. Step 5: Solve for x
    x = 282,075,712,580.22/608,615.80
  6. Step 6: Final answer
    x = 463,470.90

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.