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Finding the Fourth Proportional to 557,055.66, 768,655.71 and 318,545.58

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Solution

The fourth proportional to 557,055.66, 768,655.71 and 318,545.58 is: 439,546.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,055.66 : 768,655.71 = 318,545.58 : x
  2. Step 2: Convert to fraction form
    557,055.66/768,655.71 = 318,545.58/x
  3. Step 3: Cross multiply
    557,055.66x = 768,655.71 × 318,545.58
  4. Step 4: Simplify right side
    557,055.66x = 244,851,878,962.26
  5. Step 5: Solve for x
    x = 244,851,878,962.26/557,055.66
  6. Step 6: Final answer
    x = 439,546.52

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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.