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Finding the Fourth Proportional to 411,939.20, 616,699.20 and 307,222.40

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Solution

The fourth proportional to 411,939.20, 616,699.20 and 307,222.40 is: 459,931.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,939.20 : 616,699.20 = 307,222.40 : x
  2. Step 2: Convert to fraction form
    411,939.20/616,699.20 = 307,222.40/x
  3. Step 3: Cross multiply
    411,939.20x = 616,699.20 × 307,222.40
  4. Step 4: Simplify right side
    411,939.20x = 189,463,808,302.08
  5. Step 5: Solve for x
    x = 189,463,808,302.08/411,939.20
  6. Step 6: Final answer
    x = 459,931.49

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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.