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Finding the Fourth Proportional to 710,879.48, 981,013.76 and 388,590.88

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Solution

The fourth proportional to 710,879.48, 981,013.76 and 388,590.88 is: 536,255.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,879.48 : 981,013.76 = 388,590.88 : x
  2. Step 2: Convert to fraction form
    710,879.48/981,013.76 = 388,590.88/x
  3. Step 3: Cross multiply
    710,879.48x = 981,013.76 × 388,590.88
  4. Step 4: Simplify right side
    710,879.48x = 381,213,000,290.51
  5. Step 5: Solve for x
    x = 381,213,000,290.51/710,879.48
  6. Step 6: Final answer
    x = 536,255.46

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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.