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Finding the Fourth Proportional to 900,661.82, 1,242,749 and 513,460.76

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Solution

The fourth proportional to 900,661.82, 1,242,749 and 513,460.76 is: 708,482.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    900,661.82 : 1,242,749 = 513,460.76 : x
  2. Step 2: Convert to fraction form
    900,661.82/1,242,749 = 513,460.76/x
  3. Step 3: Cross multiply
    900,661.82x = 1,242,749 × 513,460.76
  4. Step 4: Simplify right side
    900,661.82x = 638,102,846,029.24
  5. Step 5: Solve for x
    x = 638,102,846,029.24/900,661.82
  6. Step 6: Final answer
    x = 708,482.18

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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.