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Finding the Fourth Proportional to 612,429.80, 918,831.47 and 313,120.62

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Solution

The fourth proportional to 612,429.80, 918,831.47 and 313,120.62 is: 469,776.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,429.80 : 918,831.47 = 313,120.62 : x
  2. Step 2: Convert to fraction form
    612,429.80/918,831.47 = 313,120.62/x
  3. Step 3: Cross multiply
    612,429.80x = 918,831.47 × 313,120.62
  4. Step 4: Simplify right side
    612,429.80x = 287,705,077,996.31
  5. Step 5: Solve for x
    x = 287,705,077,996.31/612,429.80
  6. Step 6: Final answer
    x = 469,776.42

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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.