Home / 724,418.48-999,678.72-402,120.24

Finding the Fourth Proportional to 724,418.48, 999,678.72 and 402,120.24

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Solution

The fourth proportional to 724,418.48, 999,678.72 and 402,120.24 is: 554,915.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,418.48 : 999,678.72 = 402,120.24 : x
  2. Step 2: Convert to fraction form
    724,418.48/999,678.72 = 402,120.24/x
  3. Step 3: Cross multiply
    724,418.48x = 999,678.72 × 402,120.24
  4. Step 4: Simplify right side
    724,418.48x = 401,991,046,809.29
  5. Step 5: Solve for x
    x = 401,991,046,809.29/724,418.48
  6. Step 6: Final answer
    x = 554,915.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.