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Finding the Fourth Proportional to 426,847.70, 640,271.55 and 402,353.30

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Solution

The fourth proportional to 426,847.70, 640,271.55 and 402,353.30 is: 603,529.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,847.70 : 640,271.55 = 402,353.30 : x
  2. Step 2: Convert to fraction form
    426,847.70/640,271.55 = 402,353.30/x
  3. Step 3: Cross multiply
    426,847.70x = 640,271.55 × 402,353.30
  4. Step 4: Simplify right side
    426,847.70x = 257,615,371,038.62
  5. Step 5: Solve for x
    x = 257,615,371,038.62/426,847.70
  6. Step 6: Final answer
    x = 603,529.95

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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.