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Finding the Fourth Proportional to 665,117.40, 917,865.72 and 363,311.40

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Solution

The fourth proportional to 665,117.40, 917,865.72 and 363,311.40 is: 501,371.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,117.40 : 917,865.72 = 363,311.40 : x
  2. Step 2: Convert to fraction form
    665,117.40/917,865.72 = 363,311.40/x
  3. Step 3: Cross multiply
    665,117.40x = 917,865.72 × 363,311.40
  4. Step 4: Simplify right side
    665,117.40x = 333,471,077,928.65
  5. Step 5: Solve for x
    x = 333,471,077,928.65/665,117.40
  6. Step 6: Final answer
    x = 501,371.75

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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.