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Finding the Fourth Proportional to 528,205.86, 728,904.42 and 313,217.28

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Solution

The fourth proportional to 528,205.86, 728,904.42 and 313,217.28 is: 432,228.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,205.86 : 728,904.42 = 313,217.28 : x
  2. Step 2: Convert to fraction form
    528,205.86/728,904.42 = 313,217.28/x
  3. Step 3: Cross multiply
    528,205.86x = 728,904.42 × 313,217.28
  4. Step 4: Simplify right side
    528,205.86x = 228,305,459,812.38
  5. Step 5: Solve for x
    x = 228,305,459,812.38/528,205.86
  6. Step 6: Final answer
    x = 432,228.18

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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.