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Finding the Fourth Proportional to 710,325.72, 980,243.76 and 388,035.96

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Solution

The fourth proportional to 710,325.72, 980,243.76 and 388,035.96 is: 535,486.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    710,325.72 : 980,243.76 = 388,035.96 : x
  2. Step 2: Convert to fraction form
    710,325.72/980,243.76 = 388,035.96/x
  3. Step 3: Cross multiply
    710,325.72x = 980,243.76 × 388,035.96
  4. Step 4: Simplify right side
    710,325.72x = 380,369,828,445.61
  5. Step 5: Solve for x
    x = 380,369,828,445.61/710,325.72
  6. Step 6: Final answer
    x = 535,486.49

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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.