Home / 1,572.04-2,358.54-921.40

Finding the Fourth Proportional to 1,572.04, 2,358.54 and 921.40

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Solution

The fourth proportional to 1,572.04, 2,358.54 and 921.40 is: 1,382.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,572.04 : 2,358.54 = 921.40 : x
  2. Step 2: Convert to fraction form
    1,572.04/2,358.54 = 921.40/x
  3. Step 3: Cross multiply
    1,572.04x = 2,358.54 × 921.40
  4. Step 4: Simplify right side
    1,572.04x = 2,173,158.76
  5. Step 5: Solve for x
    x = 2,173,158.76/1,572.04
  6. Step 6: Final answer
    x = 1,382.38

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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.