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Finding the Fourth Proportional to 810.77, 1,117.98 and 530.91

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Solution

The fourth proportional to 810.77, 1,117.98 and 530.91 is: 732.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    810.77 : 1,117.98 = 530.91 : x
  2. Step 2: Convert to fraction form
    810.77/1,117.98 = 530.91/x
  3. Step 3: Cross multiply
    810.77x = 1,117.98 × 530.91
  4. Step 4: Simplify right side
    810.77x = 593,546.76
  5. Step 5: Solve for x
    x = 593,546.76/810.77
  6. Step 6: Final answer
    x = 732.08

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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.