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Finding the Fourth Proportional to 1,045.36, 1,567.40 and 395.40

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Solution

The fourth proportional to 1,045.36, 1,567.40 and 395.40 is: 592.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,045.36 : 1,567.40 = 395.40 : x
  2. Step 2: Convert to fraction form
    1,045.36/1,567.40 = 395.40/x
  3. Step 3: Cross multiply
    1,045.36x = 1,567.40 × 395.40
  4. Step 4: Simplify right side
    1,045.36x = 619,749.96
  5. Step 5: Solve for x
    x = 619,749.96/1,045.36
  6. Step 6: Final answer
    x = 592.86

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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.