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Finding the Fourth Proportional to 1,345.48, 2,018.15 and 790.49

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Solution

The fourth proportional to 1,345.48, 2,018.15 and 790.49 is: 1,185.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,345.48 : 2,018.15 = 790.49 : x
  2. Step 2: Convert to fraction form
    1,345.48/2,018.15 = 790.49/x
  3. Step 3: Cross multiply
    1,345.48x = 2,018.15 × 790.49
  4. Step 4: Simplify right side
    1,345.48x = 1,595,331.45
  5. Step 5: Solve for x
    x = 1,595,331.45/1,345.48
  6. Step 6: Final answer
    x = 1,185.70

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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.