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Finding the Fourth Proportional to 661,925.16, 913,418.10 and 371,509.74

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Solution

The fourth proportional to 661,925.16, 913,418.10 and 371,509.74 is: 512,661.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,925.16 : 913,418.10 = 371,509.74 : x
  2. Step 2: Convert to fraction form
    661,925.16/913,418.10 = 371,509.74/x
  3. Step 3: Cross multiply
    661,925.16x = 913,418.10 × 371,509.74
  4. Step 4: Simplify right side
    661,925.16x = 339,343,720,842.29
  5. Step 5: Solve for x
    x = 339,343,720,842.29/661,925.16
  6. Step 6: Final answer
    x = 512,661.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.