Home / 1,058.16-1,587.28-399.98

Finding the Fourth Proportional to 1,058.16, 1,587.28 and 399.98

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Solution

The fourth proportional to 1,058.16, 1,587.28 and 399.98 is: 599.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,058.16 : 1,587.28 = 399.98 : x
  2. Step 2: Convert to fraction form
    1,058.16/1,587.28 = 399.98/x
  3. Step 3: Cross multiply
    1,058.16x = 1,587.28 × 399.98
  4. Step 4: Simplify right side
    1,058.16x = 634,880.25
  5. Step 5: Solve for x
    x = 634,880.25/1,058.16
  6. Step 6: Final answer
    x = 599.99

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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.