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Finding the Fourth Proportional to 926.40, 1,386.84 and 560.08

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Solution

The fourth proportional to 926.40, 1,386.84 and 560.08 is: 838.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    926.40 : 1,386.84 = 560.08 : x
  2. Step 2: Convert to fraction form
    926.40/1,386.84 = 560.08/x
  3. Step 3: Cross multiply
    926.40x = 1,386.84 × 560.08
  4. Step 4: Simplify right side
    926.40x = 776,737.88
  5. Step 5: Solve for x
    x = 776,737.88/926.40
  6. Step 6: Final answer
    x = 838.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.