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Finding the Fourth Proportional to 557,339.61, 769,176.09 and 315,665.18

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Solution

The fourth proportional to 557,339.61, 769,176.09 and 315,665.18 is: 435,644.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,339.61 : 769,176.09 = 315,665.18 : x
  2. Step 2: Convert to fraction form
    557,339.61/769,176.09 = 315,665.18/x
  3. Step 3: Cross multiply
    557,339.61x = 769,176.09 × 315,665.18
  4. Step 4: Simplify right side
    557,339.61x = 242,802,105,055.67
  5. Step 5: Solve for x
    x = 242,802,105,055.67/557,339.61
  6. Step 6: Final answer
    x = 435,644.80

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1.5x scale

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.