Home / 1,030.20-1,545.30-1,019.40

Finding the Fourth Proportional to 1,030.20, 1,545.30 and 1,019.40

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Solution

The fourth proportional to 1,030.20, 1,545.30 and 1,019.40 is: 1,529.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,030.20 : 1,545.30 = 1,019.40 : x
  2. Step 2: Convert to fraction form
    1,030.20/1,545.30 = 1,019.40/x
  3. Step 3: Cross multiply
    1,030.20x = 1,545.30 × 1,019.40
  4. Step 4: Simplify right side
    1,030.20x = 1,575,278.82
  5. Step 5: Solve for x
    x = 1,575,278.82/1,030.20
  6. Step 6: Final answer
    x = 1,529.10

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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.