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Finding the Fourth Proportional to 609,511.40, 912,711.90 and 485,095.40

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Solution

The fourth proportional to 609,511.40, 912,711.90 and 485,095.40 is: 726,405.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    609,511.40 : 912,711.90 = 485,095.40 : x
  2. Step 2: Convert to fraction form
    609,511.40/912,711.90 = 485,095.40/x
  3. Step 3: Cross multiply
    609,511.40x = 912,711.90 × 485,095.40
  4. Step 4: Simplify right side
    609,511.40x = 442,752,344,215.26
  5. Step 5: Solve for x
    x = 442,752,344,215.26/609,511.40
  6. Step 6: Final answer
    x = 726,405.35

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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.