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Finding the Fourth Proportional to 660,395.50, 911,345.79 and 358,589.50

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Solution

The fourth proportional to 660,395.50, 911,345.79 and 358,589.50 is: 494,853.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,395.50 : 911,345.79 = 358,589.50 : x
  2. Step 2: Convert to fraction form
    660,395.50/911,345.79 = 358,589.50/x
  3. Step 3: Cross multiply
    660,395.50x = 911,345.79 × 358,589.50
  4. Step 4: Simplify right side
    660,395.50x = 326,799,031,163.21
  5. Step 5: Solve for x
    x = 326,799,031,163.21/660,395.50
  6. Step 6: Final answer
    x = 494,853.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.