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Finding the Fourth Proportional to 1,156,531.10, 1,595,978.64 and 640,308

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Solution

The fourth proportional to 1,156,531.10, 1,595,978.64 and 640,308 is: 883,606.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,156,531.10 : 1,595,978.64 = 640,308 : x
  2. Step 2: Convert to fraction form
    1,156,531.10/1,595,978.64 = 640,308/x
  3. Step 3: Cross multiply
    1,156,531.10x = 1,595,978.64 × 640,308
  4. Step 4: Simplify right side
    1,156,531.10x = 1,021,917,891,021.12
  5. Step 5: Solve for x
    x = 1,021,917,891,021.12/1,156,531.10
  6. Step 6: Final answer
    x = 883,606.06

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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.