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Finding the Fourth Proportional to 538,931, 808,393.26 and 139,570.76

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Solution

The fourth proportional to 538,931, 808,393.26 and 139,570.76 is: 209,355.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,931 : 808,393.26 = 139,570.76 : x
  2. Step 2: Convert to fraction form
    538,931/808,393.26 = 139,570.76/x
  3. Step 3: Cross multiply
    538,931x = 808,393.26 × 139,570.76
  4. Step 4: Simplify right side
    538,931x = 112,828,061,677.08
  5. Step 5: Solve for x
    x = 112,828,061,677.08/538,931
  6. Step 6: Final answer
    x = 209,355.30

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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.