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Finding the Fourth Proportional to 607,865.61, 838,970.46 and 400,770.38

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Solution

The fourth proportional to 607,865.61, 838,970.46 and 400,770.38 is: 553,139.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    607,865.61 : 838,970.46 = 400,770.38 : x
  2. Step 2: Convert to fraction form
    607,865.61/838,970.46 = 400,770.38/x
  3. Step 3: Cross multiply
    607,865.61x = 838,970.46 × 400,770.38
  4. Step 4: Simplify right side
    607,865.61x = 336,234,512,160.40
  5. Step 5: Solve for x
    x = 336,234,512,160.40/607,865.61
  6. Step 6: Final answer
    x = 553,139.55

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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.