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Finding the Fourth Proportional to 677,437.80, 934,905.54 and 390,976.34

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Solution

The fourth proportional to 677,437.80, 934,905.54 and 390,976.34 is: 539,571.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,437.80 : 934,905.54 = 390,976.34 : x
  2. Step 2: Convert to fraction form
    677,437.80/934,905.54 = 390,976.34/x
  3. Step 3: Cross multiply
    677,437.80x = 934,905.54 × 390,976.34
  4. Step 4: Simplify right side
    677,437.80x = 365,525,943,066.56
  5. Step 5: Solve for x
    x = 365,525,943,066.56/677,437.80
  6. Step 6: Final answer
    x = 539,571.23

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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.