Home / 1,875.20-2,587.68-1,047.20

Finding the Fourth Proportional to 1,875.20, 2,587.68 and 1,047.20

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Solution

The fourth proportional to 1,875.20, 2,587.68 and 1,047.20 is: 1,445.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,875.20 : 2,587.68 = 1,047.20 : x
  2. Step 2: Convert to fraction form
    1,875.20/2,587.68 = 1,047.20/x
  3. Step 3: Cross multiply
    1,875.20x = 2,587.68 × 1,047.20
  4. Step 4: Simplify right side
    1,875.20x = 2,709,818.50
  5. Step 5: Solve for x
    x = 2,709,818.50/1,875.20
  6. Step 6: Final answer
    x = 1,445.08

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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.