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Finding the Fourth Proportional to 554,964.40, 830,603.40 and 389,076.40

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Solution

The fourth proportional to 554,964.40, 830,603.40 and 389,076.40 is: 582,322.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,964.40 : 830,603.40 = 389,076.40 : x
  2. Step 2: Convert to fraction form
    554,964.40/830,603.40 = 389,076.40/x
  3. Step 3: Cross multiply
    554,964.40x = 830,603.40 × 389,076.40
  4. Step 4: Simplify right side
    554,964.40x = 323,168,180,699.76
  5. Step 5: Solve for x
    x = 323,168,180,699.76/554,964.40
  6. Step 6: Final answer
    x = 582,322.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.