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Finding the Fourth Proportional to 662,139.12, 913,752.72 and 371,710.32

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Solution

The fourth proportional to 662,139.12, 913,752.72 and 371,710.32 is: 512,960.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,139.12 : 913,752.72 = 371,710.32 : x
  2. Step 2: Convert to fraction form
    662,139.12/913,752.72 = 371,710.32/x
  3. Step 3: Cross multiply
    662,139.12x = 913,752.72 × 371,710.32
  4. Step 4: Simplify right side
    662,139.12x = 339,651,315,952.07
  5. Step 5: Solve for x
    x = 339,651,315,952.07/662,139.12
  6. Step 6: Final answer
    x = 512,960.65

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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.