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Finding the Fourth Proportional to 697,421.87, 962,543.64 and 391,624.73

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Solution

The fourth proportional to 697,421.87, 962,543.64 and 391,624.73 is: 540,499.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    697,421.87 : 962,543.64 = 391,624.73 : x
  2. Step 2: Convert to fraction form
    697,421.87/962,543.64 = 391,624.73/x
  3. Step 3: Cross multiply
    697,421.87x = 962,543.64 × 391,624.73
  4. Step 4: Simplify right side
    697,421.87x = 376,955,893,128.22
  5. Step 5: Solve for x
    x = 376,955,893,128.22/697,421.87
  6. Step 6: Final answer
    x = 540,499.10

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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.