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Finding the Fourth Proportional to 603,614.40, 904,384.80 and 287,390.40

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Solution

The fourth proportional to 603,614.40, 904,384.80 and 287,390.40 is: 430,591.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,614.40 : 904,384.80 = 287,390.40 : x
  2. Step 2: Convert to fraction form
    603,614.40/904,384.80 = 287,390.40/x
  3. Step 3: Cross multiply
    603,614.40x = 904,384.80 × 287,390.40
  4. Step 4: Simplify right side
    603,614.40x = 259,911,509,425.92
  5. Step 5: Solve for x
    x = 259,911,509,425.92/603,614.40
  6. Step 6: Final answer
    x = 430,591.96

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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.