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Finding the Fourth Proportional to 820,322.90, 1,145,652.70 and 820,322.90

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Solution

The fourth proportional to 820,322.90, 1,145,652.70 and 820,322.90 is: 1,145,652.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,322.90 : 1,145,652.70 = 820,322.90 : x
  2. Step 2: Convert to fraction form
    820,322.90/1,145,652.70 = 820,322.90/x
  3. Step 3: Cross multiply
    820,322.90x = 1,145,652.70 × 820,322.90
  4. Step 4: Simplify right side
    820,322.90x = 939,805,145,256.83
  5. Step 5: Solve for x
    x = 939,805,145,256.83/820,322.90
  6. Step 6: Final answer
    x = 1,145,652.70

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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.