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Finding the Fourth Proportional to 640,749.26, 884,212.32 and 368,779.40

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Solution

The fourth proportional to 640,749.26, 884,212.32 and 368,779.40 is: 508,903.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,749.26 : 884,212.32 = 368,779.40 : x
  2. Step 2: Convert to fraction form
    640,749.26/884,212.32 = 368,779.40/x
  3. Step 3: Cross multiply
    640,749.26x = 884,212.32 × 368,779.40
  4. Step 4: Simplify right side
    640,749.26x = 326,079,288,842.21
  5. Step 5: Solve for x
    x = 326,079,288,842.21/640,749.26
  6. Step 6: Final answer
    x = 508,903.11

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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.