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Finding the Fourth Proportional to 692,218.40, 955,328.28 and 420,223.28

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Solution

The fourth proportional to 692,218.40, 955,328.28 and 420,223.28 is: 579,948.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,218.40 : 955,328.28 = 420,223.28 : x
  2. Step 2: Convert to fraction form
    692,218.40/955,328.28 = 420,223.28/x
  3. Step 3: Cross multiply
    692,218.40x = 955,328.28 × 420,223.28
  4. Step 4: Simplify right side
    692,218.40x = 401,451,183,298.36
  5. Step 5: Solve for x
    x = 401,451,183,298.36/692,218.40
  6. Step 6: Final answer
    x = 579,948.73

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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.