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Finding the Fourth Proportional to 338,390.68, 507,601.58 and 138,570.93

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Solution

The fourth proportional to 338,390.68, 507,601.58 and 138,570.93 is: 207,862.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,390.68 : 507,601.58 = 138,570.93 : x
  2. Step 2: Convert to fraction form
    338,390.68/507,601.58 = 138,570.93/x
  3. Step 3: Cross multiply
    338,390.68x = 507,601.58 × 138,570.93
  4. Step 4: Simplify right side
    338,390.68x = 70,338,823,010.07
  5. Step 5: Solve for x
    x = 70,338,823,010.07/338,390.68
  6. Step 6: Final answer
    x = 207,862.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.