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Finding the Fourth Proportional to 457,870.40, 686,805.60 and 432,065.60

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Solution

The fourth proportional to 457,870.40, 686,805.60 and 432,065.60 is: 648,098.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,870.40 : 686,805.60 = 432,065.60 : x
  2. Step 2: Convert to fraction form
    457,870.40/686,805.60 = 432,065.60/x
  3. Step 3: Cross multiply
    457,870.40x = 686,805.60 × 432,065.60
  4. Step 4: Simplify right side
    457,870.40x = 296,745,073,647.36
  5. Step 5: Solve for x
    x = 296,745,073,647.36/457,870.40
  6. Step 6: Final answer
    x = 648,098.40

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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.