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Finding the Fourth Proportional to 338,395.16, 507,593.28 and 138,678.32

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Solution

The fourth proportional to 338,395.16, 507,593.28 and 138,678.32 is: 208,017.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,395.16 : 507,593.28 = 138,678.32 : x
  2. Step 2: Convert to fraction form
    338,395.16/507,593.28 = 138,678.32/x
  3. Step 3: Cross multiply
    338,395.16x = 507,593.28 × 138,678.32
  4. Step 4: Simplify right side
    338,395.16x = 70,392,183,313.69
  5. Step 5: Solve for x
    x = 70,392,183,313.69/338,395.16
  6. Step 6: Final answer
    x = 208,017.70

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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.