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Finding the Fourth Proportional to 405,638.60, 608,457.90 and 366,931.40

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Solution

The fourth proportional to 405,638.60, 608,457.90 and 366,931.40 is: 550,397.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,638.60 : 608,457.90 = 366,931.40 : x
  2. Step 2: Convert to fraction form
    405,638.60/608,457.90 = 366,931.40/x
  3. Step 3: Cross multiply
    405,638.60x = 608,457.90 × 366,931.40
  4. Step 4: Simplify right side
    405,638.60x = 223,262,309,088.06
  5. Step 5: Solve for x
    x = 223,262,309,088.06/405,638.60
  6. Step 6: Final answer
    x = 550,397.10

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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.