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Finding the Fourth Proportional to 910.76, 1,256.72 and 512.37

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Solution

The fourth proportional to 910.76, 1,256.72 and 512.37 is: 707.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.76 : 1,256.72 = 512.37 : x
  2. Step 2: Convert to fraction form
    910.76/1,256.72 = 512.37/x
  3. Step 3: Cross multiply
    910.76x = 1,256.72 × 512.37
  4. Step 4: Simplify right side
    910.76x = 643,903.06
  5. Step 5: Solve for x
    x = 643,903.06/910.76
  6. Step 6: Final answer
    x = 707.00

Related Problems

Find fourth proportional to 455.38, 628.36 and 256.19
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.