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Finding the Fourth Proportional to 643,334.65, 887,830.80 and 356,854.66

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Solution

The fourth proportional to 643,334.65, 887,830.80 and 356,854.66 is: 492,475.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,334.65 : 887,830.80 = 356,854.66 : x
  2. Step 2: Convert to fraction form
    643,334.65/887,830.80 = 356,854.66/x
  3. Step 3: Cross multiply
    643,334.65x = 887,830.80 × 356,854.66
  4. Step 4: Simplify right side
    643,334.65x = 316,826,558,271.53
  5. Step 5: Solve for x
    x = 316,826,558,271.53/643,334.65
  6. Step 6: Final answer
    x = 492,475.51

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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.