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Finding the Fourth Proportional to 608,400.90, 912,622.56 and 209,038.80

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Solution

The fourth proportional to 608,400.90, 912,622.56 and 209,038.80 is: 313,565.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,400.90 : 912,622.56 = 209,038.80 : x
  2. Step 2: Convert to fraction form
    608,400.90/912,622.56 = 209,038.80/x
  3. Step 3: Cross multiply
    608,400.90x = 912,622.56 × 209,038.80
  4. Step 4: Simplify right side
    608,400.90x = 190,773,524,795.33
  5. Step 5: Solve for x
    x = 190,773,524,795.33/608,400.90
  6. Step 6: Final answer
    x = 313,565.49

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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.