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Finding the Fourth Proportional to 697,455.90, 962,488.65 and 391,532.88

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Solution

The fourth proportional to 697,455.90, 962,488.65 and 391,532.88 is: 540,315.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    697,455.90 : 962,488.65 = 391,532.88 : x
  2. Step 2: Convert to fraction form
    697,455.90/962,488.65 = 391,532.88/x
  3. Step 3: Cross multiply
    697,455.90x = 962,488.65 × 391,532.88
  4. Step 4: Simplify right side
    697,455.90x = 376,845,953,101.81
  5. Step 5: Solve for x
    x = 376,845,953,101.81/697,455.90
  6. Step 6: Final answer
    x = 540,315.10

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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.