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Finding the Fourth Proportional to 615,192.94, 921,492.33 and 390,434.86

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Solution

The fourth proportional to 615,192.94, 921,492.33 and 390,434.86 is: 584,829.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,192.94 : 921,492.33 = 390,434.86 : x
  2. Step 2: Convert to fraction form
    615,192.94/921,492.33 = 390,434.86/x
  3. Step 3: Cross multiply
    615,192.94x = 921,492.33 × 390,434.86
  4. Step 4: Simplify right side
    615,192.94x = 359,782,728,854.62
  5. Step 5: Solve for x
    x = 359,782,728,854.62/615,192.94
  6. Step 6: Final answer
    x = 584,829.09

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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.