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Finding the Fourth Proportional to 1,059.80, 1,590.44 and 435.59

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Solution

The fourth proportional to 1,059.80, 1,590.44 and 435.59 is: 653.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,059.80 : 1,590.44 = 435.59 : x
  2. Step 2: Convert to fraction form
    1,059.80/1,590.44 = 435.59/x
  3. Step 3: Cross multiply
    1,059.80x = 1,590.44 × 435.59
  4. Step 4: Simplify right side
    1,059.80x = 692,783.74
  5. Step 5: Solve for x
    x = 692,783.74/1,059.80
  6. Step 6: Final answer
    x = 653.69

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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.