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Finding the Fourth Proportional to 712,737.93, 983,602.82 and 390,447.94

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Solution

The fourth proportional to 712,737.93, 983,602.82 and 390,447.94 is: 538,831.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,737.93 : 983,602.82 = 390,447.94 : x
  2. Step 2: Convert to fraction form
    712,737.93/983,602.82 = 390,447.94/x
  3. Step 3: Cross multiply
    712,737.93x = 983,602.82 × 390,447.94
  4. Step 4: Simplify right side
    712,737.93x = 384,045,693,364.30
  5. Step 5: Solve for x
    x = 384,045,693,364.30/712,737.93
  6. Step 6: Final answer
    x = 538,831.57

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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.