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Finding the Fourth Proportional to 1,416.73, 2,125.10 and 390.73

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Solution

The fourth proportional to 1,416.73, 2,125.10 and 390.73 is: 586.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,416.73 : 2,125.10 = 390.73 : x
  2. Step 2: Convert to fraction form
    1,416.73/2,125.10 = 390.73/x
  3. Step 3: Cross multiply
    1,416.73x = 2,125.10 × 390.73
  4. Step 4: Simplify right side
    1,416.73x = 830,340.32
  5. Step 5: Solve for x
    x = 830,340.32/1,416.73
  6. Step 6: Final answer
    x = 586.10

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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.