Home / 390,931.92-539,879.04-336,914.64

Finding the Fourth Proportional to 390,931.92, 539,879.04 and 336,914.64

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Solution

The fourth proportional to 390,931.92, 539,879.04 and 336,914.64 is: 465,280.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,931.92 : 539,879.04 = 336,914.64 : x
  2. Step 2: Convert to fraction form
    390,931.92/539,879.04 = 336,914.64/x
  3. Step 3: Cross multiply
    390,931.92x = 539,879.04 × 336,914.64
  4. Step 4: Simplify right side
    390,931.92x = 181,893,152,405.15
  5. Step 5: Solve for x
    x = 181,893,152,405.15/390,931.92
  6. Step 6: Final answer
    x = 465,280.89

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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.