Home / 1,045.90-1,569.08-490.20

Finding the Fourth Proportional to 1,045.90, 1,569.08 and 490.20

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Solution

The fourth proportional to 1,045.90, 1,569.08 and 490.20 is: 735.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,045.90 : 1,569.08 = 490.20 : x
  2. Step 2: Convert to fraction form
    1,045.90/1,569.08 = 490.20/x
  3. Step 3: Cross multiply
    1,045.90x = 1,569.08 × 490.20
  4. Step 4: Simplify right side
    1,045.90x = 769,158.36
  5. Step 5: Solve for x
    x = 769,158.36/1,045.90
  6. Step 6: Final answer
    x = 735.40

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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.