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Finding the Fourth Proportional to 629,655.85, 868,945.42 and 357,718.80

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Solution

The fourth proportional to 629,655.85, 868,945.42 and 357,718.80 is: 493,663.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,655.85 : 868,945.42 = 357,718.80 : x
  2. Step 2: Convert to fraction form
    629,655.85/868,945.42 = 357,718.80/x
  3. Step 3: Cross multiply
    629,655.85x = 868,945.42 × 357,718.80
  4. Step 4: Simplify right side
    629,655.85x = 310,838,112,907.90
  5. Step 5: Solve for x
    x = 310,838,112,907.90/629,655.85
  6. Step 6: Final answer
    x = 493,663.50

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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.