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Finding the Fourth Proportional to 909.50, 1,254.30 and 615.16

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Solution

The fourth proportional to 909.50, 1,254.30 and 615.16 is: 848.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    909.50 : 1,254.30 = 615.16 : x
  2. Step 2: Convert to fraction form
    909.50/1,254.30 = 615.16/x
  3. Step 3: Cross multiply
    909.50x = 1,254.30 × 615.16
  4. Step 4: Simplify right side
    909.50x = 771,594.45
  5. Step 5: Solve for x
    x = 771,594.45/909.50
  6. Step 6: Final answer
    x = 848.38

Related Problems

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Half scale
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Double scale
Find fourth proportional to 910.50, 1,255.68 and 616.16
Similar ratio
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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.