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Finding the Fourth Proportional to 402,485.60, 604,117.20 and 245,021.60

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Solution

The fourth proportional to 402,485.60, 604,117.20 and 245,021.60 is: 367,769.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,485.60 : 604,117.20 = 245,021.60 : x
  2. Step 2: Convert to fraction form
    402,485.60/604,117.20 = 245,021.60/x
  3. Step 3: Cross multiply
    402,485.60x = 604,117.20 × 245,021.60
  4. Step 4: Simplify right side
    402,485.60x = 148,021,762,931.52
  5. Step 5: Solve for x
    x = 148,021,762,931.52/402,485.60
  6. Step 6: Final answer
    x = 367,769.09

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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.