Home / 420,853.04-631,581.28-285,579.76

Finding the Fourth Proportional to 420,853.04, 631,581.28 and 285,579.76

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Solution

The fourth proportional to 420,853.04, 631,581.28 and 285,579.76 is: 428,574.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,853.04 : 631,581.28 = 285,579.76 : x
  2. Step 2: Convert to fraction form
    420,853.04/631,581.28 = 285,579.76/x
  3. Step 3: Cross multiply
    420,853.04x = 631,581.28 × 285,579.76
  4. Step 4: Simplify right side
    420,853.04x = 180,366,830,362.89
  5. Step 5: Solve for x
    x = 180,366,830,362.89/420,853.04
  6. Step 6: Final answer
    x = 428,574.38

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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.