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Finding the Fourth Proportional to 660,004.90, 910,807.14 and 358,198.90

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Solution

The fourth proportional to 660,004.90, 910,807.14 and 358,198.90 is: 494,314.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,004.90 : 910,807.14 = 358,198.90 : x
  2. Step 2: Convert to fraction form
    660,004.90/910,807.14 = 358,198.90/x
  3. Step 3: Cross multiply
    660,004.90x = 910,807.14 × 358,198.90
  4. Step 4: Simplify right side
    660,004.90x = 326,250,115,660.15
  5. Step 5: Solve for x
    x = 326,250,115,660.15/660,004.90
  6. Step 6: Final answer
    x = 494,314.69

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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.