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Finding the Fourth Proportional to 528,433.88, 728,916.17 and 313,429.91

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Solution

The fourth proportional to 528,433.88, 728,916.17 and 313,429.91 is: 432,341.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,433.88 : 728,916.17 = 313,429.91 : x
  2. Step 2: Convert to fraction form
    528,433.88/728,916.17 = 313,429.91/x
  3. Step 3: Cross multiply
    528,433.88x = 728,916.17 × 313,429.91
  4. Step 4: Simplify right side
    528,433.88x = 228,464,124,348.91
  5. Step 5: Solve for x
    x = 228,464,124,348.91/528,433.88
  6. Step 6: Final answer
    x = 432,341.94

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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.