Home / 711,342.02-981,638.16-389,051.12

Finding the Fourth Proportional to 711,342.02, 981,638.16 and 389,051.12

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Solution

The fourth proportional to 711,342.02, 981,638.16 and 389,051.12 is: 536,882.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,342.02 : 981,638.16 = 389,051.12 : x
  2. Step 2: Convert to fraction form
    711,342.02/981,638.16 = 389,051.12/x
  3. Step 3: Cross multiply
    711,342.02x = 981,638.16 × 389,051.12
  4. Step 4: Simplify right side
    711,342.02x = 381,907,425,582.74
  5. Step 5: Solve for x
    x = 381,907,425,582.74/711,342.02
  6. Step 6: Final answer
    x = 536,882.98

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Double scale
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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.