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Finding the Fourth Proportional to 665,259.40, 918,058.08 and 359,335.90

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Solution

The fourth proportional to 665,259.40, 918,058.08 and 359,335.90 is: 495,883.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,259.40 : 918,058.08 = 359,335.90 : x
  2. Step 2: Convert to fraction form
    665,259.40/918,058.08 = 359,335.90/x
  3. Step 3: Cross multiply
    665,259.40x = 918,058.08 × 359,335.90
  4. Step 4: Simplify right side
    665,259.40x = 329,891,226,429.07
  5. Step 5: Solve for x
    x = 329,891,226,429.07/665,259.40
  6. Step 6: Final answer
    x = 495,883.60

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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.