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Finding the Fourth Proportional to 608,124.80, 912,187.20 and 409,059.20

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Solution

The fourth proportional to 608,124.80, 912,187.20 and 409,059.20 is: 613,588.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,124.80 : 912,187.20 = 409,059.20 : x
  2. Step 2: Convert to fraction form
    608,124.80/912,187.20 = 409,059.20/x
  3. Step 3: Cross multiply
    608,124.80x = 912,187.20 × 409,059.20
  4. Step 4: Simplify right side
    608,124.80x = 373,138,566,282.24
  5. Step 5: Solve for x
    x = 373,138,566,282.24/608,124.80
  6. Step 6: Final answer
    x = 613,588.80

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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.