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Finding the Fourth Proportional to 370,915.80, 556,373.70 and 134,428.20

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Solution

The fourth proportional to 370,915.80, 556,373.70 and 134,428.20 is: 201,642.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    370,915.80 : 556,373.70 = 134,428.20 : x
  2. Step 2: Convert to fraction form
    370,915.80/556,373.70 = 134,428.20/x
  3. Step 3: Cross multiply
    370,915.80x = 556,373.70 × 134,428.20
  4. Step 4: Simplify right side
    370,915.80x = 74,792,315,018.34
  5. Step 5: Solve for x
    x = 74,792,315,018.34/370,915.80
  6. Step 6: Final answer
    x = 201,642.30

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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.