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Finding the Fourth Proportional to 528,987.88, 730,017.73 and 311,211.89

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Solution

The fourth proportional to 528,987.88, 730,017.73 and 311,211.89 is: 429,480.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,987.88 : 730,017.73 = 311,211.89 : x
  2. Step 2: Convert to fraction form
    528,987.88/730,017.73 = 311,211.89/x
  3. Step 3: Cross multiply
    528,987.88x = 730,017.73 × 311,211.89
  4. Step 4: Simplify right side
    528,987.88x = 227,190,196,963.30
  5. Step 5: Solve for x
    x = 227,190,196,963.30/528,987.88
  6. Step 6: Final answer
    x = 429,480.91

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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.