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Finding the Fourth Proportional to 438,521.80, 615,330.20 and 438,521.80

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Solution

The fourth proportional to 438,521.80, 615,330.20 and 438,521.80 is: 615,330.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,521.80 : 615,330.20 = 438,521.80 : x
  2. Step 2: Convert to fraction form
    438,521.80/615,330.20 = 438,521.80/x
  3. Step 3: Cross multiply
    438,521.80x = 615,330.20 × 438,521.80
  4. Step 4: Simplify right side
    438,521.80x = 269,835,706,898.36
  5. Step 5: Solve for x
    x = 269,835,706,898.36/438,521.80
  6. Step 6: Final answer
    x = 615,330.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.