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Finding the Fourth Proportional to 499,365.66, 688,661.41 and 317,888.40

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Solution

The fourth proportional to 499,365.66, 688,661.41 and 317,888.40 is: 438,391.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,365.66 : 688,661.41 = 317,888.40 : x
  2. Step 2: Convert to fraction form
    499,365.66/688,661.41 = 317,888.40/x
  3. Step 3: Cross multiply
    499,365.66x = 688,661.41 × 317,888.40
  4. Step 4: Simplify right side
    499,365.66x = 218,917,475,554.40
  5. Step 5: Solve for x
    x = 218,917,475,554.40/499,365.66
  6. Step 6: Final answer
    x = 438,391.13

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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.