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Finding the Fourth Proportional to 720,058.28, 993,639.35 and 429,997.28

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Solution

The fourth proportional to 720,058.28, 993,639.35 and 429,997.28 is: 593,371.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,058.28 : 993,639.35 = 429,997.28 : x
  2. Step 2: Convert to fraction form
    720,058.28/993,639.35 = 429,997.28/x
  3. Step 3: Cross multiply
    720,058.28x = 993,639.35 × 429,997.28
  4. Step 4: Simplify right side
    720,058.28x = 427,262,213,907.76
  5. Step 5: Solve for x
    x = 427,262,213,907.76/720,058.28
  6. Step 6: Final answer
    x = 593,371.72

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1.5x scale

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.