Home / 672,495,020.58-928,066,170.36-390,216,196.86

Finding the Fourth Proportional to 672,495,020.58, 928,066,170.36 and 390,216,196.86

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Solution

The fourth proportional to 672,495,020.58, 928,066,170.36 and 390,216,196.86 is: 538,511,721.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,495,020.58 : 928,066,170.36 = 390,216,196.86 : x
  2. Step 2: Convert to fraction form
    672,495,020.58/928,066,170.36 = 390,216,196.86/x
  3. Step 3: Cross multiply
    672,495,020.58x = 928,066,170.36 × 390,216,196.86
  4. Step 4: Simplify right side
    672,495,020.58x = 362,146,451,432,304,064
  5. Step 5: Solve for x
    x = 362,146,451,432,304,064/672,495,020.58
  6. Step 6: Final answer
    x = 538,511,721.80

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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.