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Finding the Fourth Proportional to 315,938.70, 472,986.45 and 306,722.70

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Solution

The fourth proportional to 315,938.70, 472,986.45 and 306,722.70 is: 459,189.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,938.70 : 472,986.45 = 306,722.70 : x
  2. Step 2: Convert to fraction form
    315,938.70/472,986.45 = 306,722.70/x
  3. Step 3: Cross multiply
    315,938.70x = 472,986.45 × 306,722.70
  4. Step 4: Simplify right side
    315,938.70x = 145,075,681,007.42
  5. Step 5: Solve for x
    x = 145,075,681,007.42/315,938.70
  6. Step 6: Final answer
    x = 459,189.33

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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.