Home / 657,904.20-907,915.44-385,976.76

Finding the Fourth Proportional to 657,904.20, 907,915.44 and 385,976.76

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Solution

The fourth proportional to 657,904.20, 907,915.44 and 385,976.76 is: 532,652.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,904.20 : 907,915.44 = 385,976.76 : x
  2. Step 2: Convert to fraction form
    657,904.20/907,915.44 = 385,976.76/x
  3. Step 3: Cross multiply
    657,904.20x = 907,915.44 × 385,976.76
  4. Step 4: Simplify right side
    657,904.20x = 350,434,259,885.17
  5. Step 5: Solve for x
    x = 350,434,259,885.17/657,904.20
  6. Step 6: Final answer
    x = 532,652.41

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Double scale
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1.5x scale

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.