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Finding the Fourth Proportional to 628,865.85, 867,806.28 and 342,385.32

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Solution

The fourth proportional to 628,865.85, 867,806.28 and 342,385.32 is: 472,476.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,865.85 : 867,806.28 = 342,385.32 : x
  2. Step 2: Convert to fraction form
    628,865.85/867,806.28 = 342,385.32/x
  3. Step 3: Cross multiply
    628,865.85x = 867,806.28 × 342,385.32
  4. Step 4: Simplify right side
    628,865.85x = 297,124,130,875.81
  5. Step 5: Solve for x
    x = 297,124,130,875.81/628,865.85
  6. Step 6: Final answer
    x = 472,476.17

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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.