Home / 738,920.88-1,019,712.34-399,389.13

Finding the Fourth Proportional to 738,920.88, 1,019,712.34 and 399,389.13

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Solution

The fourth proportional to 738,920.88, 1,019,712.34 and 399,389.13 is: 551,157.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    738,920.88 : 1,019,712.34 = 399,389.13 : x
  2. Step 2: Convert to fraction form
    738,920.88/1,019,712.34 = 399,389.13/x
  3. Step 3: Cross multiply
    738,920.88x = 1,019,712.34 × 399,389.13
  4. Step 4: Simplify right side
    738,920.88x = 407,262,024,822.10
  5. Step 5: Solve for x
    x = 407,262,024,822.10/738,920.88
  6. Step 6: Final answer
    x = 551,157.82

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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.