Home / 427,818.11-640,804.53-402,665.45

Finding the Fourth Proportional to 427,818.11, 640,804.53 and 402,665.45

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Solution

The fourth proportional to 427,818.11, 640,804.53 and 402,665.45 is: 603,129.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,818.11 : 640,804.53 = 402,665.45 : x
  2. Step 2: Convert to fraction form
    427,818.11/640,804.53 = 402,665.45/x
  3. Step 3: Cross multiply
    427,818.11x = 640,804.53 × 402,665.45
  4. Step 4: Simplify right side
    427,818.11x = 258,029,842,740.46
  5. Step 5: Solve for x
    x = 258,029,842,740.46/427,818.11
  6. Step 6: Final answer
    x = 603,129.79

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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.