Home / 390,904.39-539,449.10-212,056.39

Finding the Fourth Proportional to 390,904.39, 539,449.10 and 212,056.39

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Solution

The fourth proportional to 390,904.39, 539,449.10 and 212,056.39 is: 292,638.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,904.39 : 539,449.10 = 212,056.39 : x
  2. Step 2: Convert to fraction form
    390,904.39/539,449.10 = 212,056.39/x
  3. Step 3: Cross multiply
    390,904.39x = 539,449.10 × 212,056.39
  4. Step 4: Simplify right side
    390,904.39x = 114,393,628,734.75
  5. Step 5: Solve for x
    x = 114,393,628,734.75/390,904.39
  6. Step 6: Final answer
    x = 292,638.38

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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.