Home / 434,399.12-648,627.40-389,128.22

Finding the Fourth Proportional to 434,399.12, 648,627.40 and 389,128.22

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Solution

The fourth proportional to 434,399.12, 648,627.40 and 389,128.22 is: 581,030.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    434,399.12 : 648,627.40 = 389,128.22 : x
  2. Step 2: Convert to fraction form
    434,399.12/648,627.40 = 389,128.22/x
  3. Step 3: Cross multiply
    434,399.12x = 648,627.40 × 389,128.22
  4. Step 4: Simplify right side
    434,399.12x = 252,399,225,605.23
  5. Step 5: Solve for x
    x = 252,399,225,605.23/434,399.12
  6. Step 6: Final answer
    x = 581,030.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.