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Finding the Fourth Proportional to 977,443.80, 1,465,728.30 and 378,205.80

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Solution

The fourth proportional to 977,443.80, 1,465,728.30 and 378,205.80 is: 567,139.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    977,443.80 : 1,465,728.30 = 378,205.80 : x
  2. Step 2: Convert to fraction form
    977,443.80/1,465,728.30 = 378,205.80/x
  3. Step 3: Cross multiply
    977,443.80x = 1,465,728.30 × 378,205.80
  4. Step 4: Simplify right side
    977,443.80x = 554,346,944,284.14
  5. Step 5: Solve for x
    x = 554,346,944,284.14/977,443.80
  6. Step 6: Final answer
    x = 567,139.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.