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Finding the Fourth Proportional to 1,058.76, 1,457.64 and 726.48

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Solution

The fourth proportional to 1,058.76, 1,457.64 and 726.48 is: 1,000.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,058.76 : 1,457.64 = 726.48 : x
  2. Step 2: Convert to fraction form
    1,058.76/1,457.64 = 726.48/x
  3. Step 3: Cross multiply
    1,058.76x = 1,457.64 × 726.48
  4. Step 4: Simplify right side
    1,058.76x = 1,058,946.31
  5. Step 5: Solve for x
    x = 1,058,946.31/1,058.76
  6. Step 6: Final answer
    x = 1,000.18

Related Problems

Find fourth proportional to 529.38, 728.82 and 363.24
Half scale
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Double scale
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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.