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Finding the Fourth Proportional to 620,391.52, 856,140.48 and 348,459.84

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Solution

The fourth proportional to 620,391.52, 856,140.48 and 348,459.84 is: 480,874.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,391.52 : 856,140.48 = 348,459.84 : x
  2. Step 2: Convert to fraction form
    620,391.52/856,140.48 = 348,459.84/x
  3. Step 3: Cross multiply
    620,391.52x = 856,140.48 × 348,459.84
  4. Step 4: Simplify right side
    620,391.52x = 298,330,574,678.32
  5. Step 5: Solve for x
    x = 298,330,574,678.32/620,391.52
  6. Step 6: Final answer
    x = 480,874.68

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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.