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Finding the Fourth Proportional to 368,681.03, 508,508.18 and 278,040.81

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Solution

The fourth proportional to 368,681.03, 508,508.18 and 278,040.81 is: 383,491.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,681.03 : 508,508.18 = 278,040.81 : x
  2. Step 2: Convert to fraction form
    368,681.03/508,508.18 = 278,040.81/x
  3. Step 3: Cross multiply
    368,681.03x = 508,508.18 × 278,040.81
  4. Step 4: Simplify right side
    368,681.03x = 141,386,024,868.62
  5. Step 5: Solve for x
    x = 141,386,024,868.62/368,681.03
  6. Step 6: Final answer
    x = 383,491.46

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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.