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Finding the Fourth Proportional to 612,477.64, 918,117.67 and 275,603.10

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Solution

The fourth proportional to 612,477.64, 918,117.67 and 275,603.10 is: 413,135.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,477.64 : 918,117.67 = 275,603.10 : x
  2. Step 2: Convert to fraction form
    612,477.64/918,117.67 = 275,603.10/x
  3. Step 3: Cross multiply
    612,477.64x = 918,117.67 × 275,603.10
  4. Step 4: Simplify right side
    612,477.64x = 253,036,076,016.78
  5. Step 5: Solve for x
    x = 253,036,076,016.78/612,477.64
  6. Step 6: Final answer
    x = 413,135.21

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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.