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Finding the Fourth Proportional to 338,426.76, 507,641.34 and 85,707.18

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Solution

The fourth proportional to 338,426.76, 507,641.34 and 85,707.18 is: 128,561.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,426.76 : 507,641.34 = 85,707.18 : x
  2. Step 2: Convert to fraction form
    338,426.76/507,641.34 = 85,707.18/x
  3. Step 3: Cross multiply
    338,426.76x = 507,641.34 × 85,707.18
  4. Step 4: Simplify right side
    338,426.76x = 43,508,507,702.82
  5. Step 5: Solve for x
    x = 43,508,507,702.82/338,426.76
  6. Step 6: Final answer
    x = 128,561.07

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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.