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Finding the Fourth Proportional to 399,038.32, 550,623.27 and 253,860.76

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Solution

The fourth proportional to 399,038.32, 550,623.27 and 253,860.76 is: 350,296.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,038.32 : 550,623.27 = 253,860.76 : x
  2. Step 2: Convert to fraction form
    399,038.32/550,623.27 = 253,860.76/x
  3. Step 3: Cross multiply
    399,038.32x = 550,623.27 × 253,860.76
  4. Step 4: Simplify right side
    399,038.32x = 139,781,641,795.89
  5. Step 5: Solve for x
    x = 139,781,641,795.89/399,038.32
  6. Step 6: Final answer
    x = 350,296.29

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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.