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Finding the Fourth Proportional to 877.38, 1,210.26 and 528

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Solution

The fourth proportional to 877.38, 1,210.26 and 528 is: 728.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    877.38 : 1,210.26 = 528 : x
  2. Step 2: Convert to fraction form
    877.38/1,210.26 = 528/x
  3. Step 3: Cross multiply
    877.38x = 1,210.26 × 528
  4. Step 4: Simplify right side
    877.38x = 639,017.28
  5. Step 5: Solve for x
    x = 639,017.28/877.38
  6. Step 6: Final answer
    x = 728.32

Related Problems

Find fourth proportional to 438.69, 605.13 and 264
Half scale
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Double scale
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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.