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Finding the Fourth Proportional to 487,628.96, 672,657.06 and 283,656.92

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Solution

The fourth proportional to 487,628.96, 672,657.06 and 283,656.92 is: 391,288.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,628.96 : 672,657.06 = 283,656.92 : x
  2. Step 2: Convert to fraction form
    487,628.96/672,657.06 = 283,656.92/x
  3. Step 3: Cross multiply
    487,628.96x = 672,657.06 × 283,656.92
  4. Step 4: Simplify right side
    487,628.96x = 190,803,829,855.86
  5. Step 5: Solve for x
    x = 190,803,829,855.86/487,628.96
  6. Step 6: Final answer
    x = 391,288.96

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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.