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Finding the Fourth Proportional to 631,145.88, 870,945.72 and 359,279.94

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Solution

The fourth proportional to 631,145.88, 870,945.72 and 359,279.94 is: 495,786.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,145.88 : 870,945.72 = 359,279.94 : x
  2. Step 2: Convert to fraction form
    631,145.88/870,945.72 = 359,279.94/x
  3. Step 3: Cross multiply
    631,145.88x = 870,945.72 × 359,279.94
  4. Step 4: Simplify right side
    631,145.88x = 312,913,326,024.86
  5. Step 5: Solve for x
    x = 312,913,326,024.86/631,145.88
  6. Step 6: Final answer
    x = 495,786.06

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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.