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Finding the Fourth Proportional to 675,885.43, 932,717.28 and 389,399.35

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Solution

The fourth proportional to 675,885.43, 932,717.28 and 389,399.35 is: 537,368.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    675,885.43 : 932,717.28 = 389,399.35 : x
  2. Step 2: Convert to fraction form
    675,885.43/932,717.28 = 389,399.35/x
  3. Step 3: Cross multiply
    675,885.43x = 932,717.28 × 389,399.35
  4. Step 4: Simplify right side
    675,885.43x = 363,199,502,565.77
  5. Step 5: Solve for x
    x = 363,199,502,565.77/675,885.43
  6. Step 6: Final answer
    x = 537,368.45

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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.