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Finding the Fourth Proportional to 687,484.32, 948,515.76 and 400,801.56

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Solution

The fourth proportional to 687,484.32, 948,515.76 and 400,801.56 is: 552,982.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,484.32 : 948,515.76 = 400,801.56 : x
  2. Step 2: Convert to fraction form
    687,484.32/948,515.76 = 400,801.56/x
  3. Step 3: Cross multiply
    687,484.32x = 948,515.76 × 400,801.56
  4. Step 4: Simplify right side
    687,484.32x = 380,166,596,292.59
  5. Step 5: Solve for x
    x = 380,166,596,292.59/687,484.32
  6. Step 6: Final answer
    x = 552,982.21

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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.