Home / 1,315.40-1,973.28-437.61

Finding the Fourth Proportional to 1,315.40, 1,973.28 and 437.61

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Solution

The fourth proportional to 1,315.40, 1,973.28 and 437.61 is: 656.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315.40 : 1,973.28 = 437.61 : x
  2. Step 2: Convert to fraction form
    1,315.40/1,973.28 = 437.61/x
  3. Step 3: Cross multiply
    1,315.40x = 1,973.28 × 437.61
  4. Step 4: Simplify right side
    1,315.40x = 863,522.13
  5. Step 5: Solve for x
    x = 863,522.13/1,315.40
  6. Step 6: Final answer
    x = 656.47

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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.