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Finding the Fourth Proportional to 528,642.61, 728,975.35 and 313,741.15

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Solution

The fourth proportional to 528,642.61, 728,975.35 and 313,741.15 is: 432,635.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,642.61 : 728,975.35 = 313,741.15 : x
  2. Step 2: Convert to fraction form
    528,642.61/728,975.35 = 313,741.15/x
  3. Step 3: Cross multiply
    528,642.61x = 728,975.35 × 313,741.15
  4. Step 4: Simplify right side
    528,642.61x = 228,709,565,415.01
  5. Step 5: Solve for x
    x = 228,709,565,415.01/528,642.61
  6. Step 6: Final answer
    x = 432,635.51

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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.