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Finding the Fourth Proportional to 3,557.65, 4,909.53 and 1,985.74

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Solution

The fourth proportional to 3,557.65, 4,909.53 and 1,985.74 is: 2,740.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,557.65 : 4,909.53 = 1,985.74 : x
  2. Step 2: Convert to fraction form
    3,557.65/4,909.53 = 1,985.74/x
  3. Step 3: Cross multiply
    3,557.65x = 4,909.53 × 1,985.74
  4. Step 4: Simplify right side
    3,557.65x = 9,749,050.10
  5. Step 5: Solve for x
    x = 9,749,050.10/3,557.65
  6. Step 6: Final answer
    x = 2,740.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.