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Finding the Fourth Proportional to 724,601, 999,980.61 and 402,311.14

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Solution

The fourth proportional to 724,601, 999,980.61 and 402,311.14 is: 555,206.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,601 : 999,980.61 = 402,311.14 : x
  2. Step 2: Convert to fraction form
    724,601/999,980.61 = 402,311.14/x
  3. Step 3: Cross multiply
    724,601x = 999,980.61 × 402,311.14
  4. Step 4: Simplify right side
    724,601x = 402,303,339,187.00
  5. Step 5: Solve for x
    x = 402,303,339,187.00/724,601
  6. Step 6: Final answer
    x = 555,206.71

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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.