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Finding the Fourth Proportional to 620,458.80, 866,870.85 and 620,458.80

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Solution

The fourth proportional to 620,458.80, 866,870.85 and 620,458.80 is: 866,870.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,458.80 : 866,870.85 = 620,458.80 : x
  2. Step 2: Convert to fraction form
    620,458.80/866,870.85 = 620,458.80/x
  3. Step 3: Cross multiply
    620,458.80x = 866,870.85 × 620,458.80
  4. Step 4: Simplify right side
    620,458.80x = 537,857,647,345.98
  5. Step 5: Solve for x
    x = 537,857,647,345.98/620,458.80
  6. Step 6: Final answer
    x = 866,870.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.