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Finding the Fourth Proportional to 528,039.26, 728,820.21 and 313,303.94

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Solution

The fourth proportional to 528,039.26, 728,820.21 and 313,303.94 is: 432,434.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,039.26 : 728,820.21 = 313,303.94 : x
  2. Step 2: Convert to fraction form
    528,039.26/728,820.21 = 313,303.94/x
  3. Step 3: Cross multiply
    528,039.26x = 728,820.21 × 313,303.94
  4. Step 4: Simplify right side
    528,039.26x = 228,342,243,344.63
  5. Step 5: Solve for x
    x = 228,342,243,344.63/528,039.26
  6. Step 6: Final answer
    x = 432,434.22

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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.