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Finding the Fourth Proportional to 405,711.40, 607,400.70 and 359,055.40

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Solution

The fourth proportional to 405,711.40, 607,400.70 and 359,055.40 is: 537,550.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,711.40 : 607,400.70 = 359,055.40 : x
  2. Step 2: Convert to fraction form
    405,711.40/607,400.70 = 359,055.40/x
  3. Step 3: Cross multiply
    405,711.40x = 607,400.70 × 359,055.40
  4. Step 4: Simplify right side
    405,711.40x = 218,090,501,298.78
  5. Step 5: Solve for x
    x = 218,090,501,298.78/405,711.40
  6. Step 6: Final answer
    x = 537,550.83

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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.