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Finding the Fourth Proportional to 612,147,646.80, 918,221,470.20 and 336,648,632.40

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Solution

The fourth proportional to 612,147,646.80, 918,221,470.20 and 336,648,632.40 is: 504,972,948.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,147,646.80 : 918,221,470.20 = 336,648,632.40 : x
  2. Step 2: Convert to fraction form
    612,147,646.80/918,221,470.20 = 336,648,632.40/x
  3. Step 3: Cross multiply
    612,147,646.80x = 918,221,470.20 × 336,648,632.40
  4. Step 4: Simplify right side
    612,147,646.80x = 309,118,002,183,147,328
  5. Step 5: Solve for x
    x = 309,118,002,183,147,328/612,147,646.80
  6. Step 6: Final answer
    x = 504,972,948.60

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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.