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Finding the Fourth Proportional to 528,615.66, 729,157.80 and 313,603.50

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Solution

The fourth proportional to 528,615.66, 729,157.80 and 313,603.50 is: 432,575.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,615.66 : 729,157.80 = 313,603.50 : x
  2. Step 2: Convert to fraction form
    528,615.66/729,157.80 = 313,603.50/x
  3. Step 3: Cross multiply
    528,615.66x = 729,157.80 × 313,603.50
  4. Step 4: Simplify right side
    528,615.66x = 228,666,438,132.30
  5. Step 5: Solve for x
    x = 228,666,438,132.30/528,615.66
  6. Step 6: Final answer
    x = 432,575.98

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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.