Home / 711,387.58-981,746.31-409,678.78

Finding the Fourth Proportional to 711,387.58, 981,746.31 and 409,678.78

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Solution

The fourth proportional to 711,387.58, 981,746.31 and 409,678.78 is: 565,374.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,387.58 : 981,746.31 = 409,678.78 : x
  2. Step 2: Convert to fraction form
    711,387.58/981,746.31 = 409,678.78/x
  3. Step 3: Cross multiply
    711,387.58x = 981,746.31 × 409,678.78
  4. Step 4: Simplify right side
    711,387.58x = 402,200,630,550.30
  5. Step 5: Solve for x
    x = 402,200,630,550.30/711,387.58
  6. Step 6: Final answer
    x = 565,374.83

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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.