Home / 724,604.25-999,985.10-402,314.39

Finding the Fourth Proportional to 724,604.25, 999,985.10 and 402,314.39

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Solution

The fourth proportional to 724,604.25, 999,985.10 and 402,314.39 is: 555,211.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,604.25 : 999,985.10 = 402,314.39 : x
  2. Step 2: Convert to fraction form
    724,604.25/999,985.10 = 402,314.39/x
  3. Step 3: Cross multiply
    724,604.25x = 999,985.10 × 402,314.39
  4. Step 4: Simplify right side
    724,604.25x = 402,308,388,504.09
  5. Step 5: Solve for x
    x = 402,308,388,504.09/724,604.25
  6. Step 6: Final answer
    x = 555,211.19

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Double scale
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Similar ratio
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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.