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Finding the Fourth Proportional to 487,487.77, 671,329.72 and 401,817.51

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Solution

The fourth proportional to 487,487.77, 671,329.72 and 401,817.51 is: 553,351.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,487.77 : 671,329.72 = 401,817.51 : x
  2. Step 2: Convert to fraction form
    487,487.77/671,329.72 = 401,817.51/x
  3. Step 3: Cross multiply
    487,487.77x = 671,329.72 × 401,817.51
  4. Step 4: Simplify right side
    487,487.77x = 269,752,036,981.67
  5. Step 5: Solve for x
    x = 269,752,036,981.67/487,487.77
  6. Step 6: Final answer
    x = 553,351.40

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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.