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Finding the Fourth Proportional to 697,040.02, 961,859.10 and 391,074.40

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Solution

The fourth proportional to 697,040.02, 961,859.10 and 391,074.40 is: 539,651.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    697,040.02 : 961,859.10 = 391,074.40 : x
  2. Step 2: Convert to fraction form
    697,040.02/961,859.10 = 391,074.40/x
  3. Step 3: Cross multiply
    697,040.02x = 961,859.10 × 391,074.40
  4. Step 4: Simplify right side
    697,040.02x = 376,158,470,417.04
  5. Step 5: Solve for x
    x = 376,158,470,417.04/697,040.02
  6. Step 6: Final answer
    x = 539,651.18

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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.