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Finding the Fourth Proportional to 1,390.07, 2,085.10 and 364.07

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Solution

The fourth proportional to 1,390.07, 2,085.10 and 364.07 is: 546.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390.07 : 2,085.10 = 364.07 : x
  2. Step 2: Convert to fraction form
    1,390.07/2,085.10 = 364.07/x
  3. Step 3: Cross multiply
    1,390.07x = 2,085.10 × 364.07
  4. Step 4: Simplify right side
    1,390.07x = 759,110.11
  5. Step 5: Solve for x
    x = 759,110.11/1,390.07
  6. Step 6: Final answer
    x = 546.10

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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.