Home / 1,019,500.74-1,529,434.98-420,128.28

Finding the Fourth Proportional to 1,019,500.74, 1,529,434.98 and 420,128.28

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Solution

The fourth proportional to 1,019,500.74, 1,529,434.98 and 420,128.28 is: 630,268.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,019,500.74 : 1,529,434.98 = 420,128.28 : x
  2. Step 2: Convert to fraction form
    1,019,500.74/1,529,434.98 = 420,128.28/x
  3. Step 3: Cross multiply
    1,019,500.74x = 1,529,434.98 × 420,128.28
  4. Step 4: Simplify right side
    1,019,500.74x = 642,558,887,519.23
  5. Step 5: Solve for x
    x = 642,558,887,519.23/1,019,500.74
  6. Step 6: Final answer
    x = 630,268.19

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Double scale
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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.