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Finding the Fourth Proportional to 672,907.05, 928,632.47 and 386,484.57

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Solution

The fourth proportional to 672,907.05, 928,632.47 and 386,484.57 is: 533,360.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,907.05 : 928,632.47 = 386,484.57 : x
  2. Step 2: Convert to fraction form
    672,907.05/928,632.47 = 386,484.57/x
  3. Step 3: Cross multiply
    672,907.05x = 928,632.47 × 386,484.57
  4. Step 4: Simplify right side
    672,907.05x = 358,902,118,923.57
  5. Step 5: Solve for x
    x = 358,902,118,923.57/672,907.05
  6. Step 6: Final answer
    x = 533,360.62

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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.