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Finding the Fourth Proportional to 1,590.70, 2,386.05 and 860.62

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Solution

The fourth proportional to 1,590.70, 2,386.05 and 860.62 is: 1,290.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,590.70 : 2,386.05 = 860.62 : x
  2. Step 2: Convert to fraction form
    1,590.70/2,386.05 = 860.62/x
  3. Step 3: Cross multiply
    1,590.70x = 2,386.05 × 860.62
  4. Step 4: Simplify right side
    1,590.70x = 2,053,482.35
  5. Step 5: Solve for x
    x = 2,053,482.35/1,590.70
  6. Step 6: Final answer
    x = 1,290.93

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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.