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Finding the Fourth Proportional to 287,892.58, 431,915.45 and 98,352.67

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Solution

The fourth proportional to 287,892.58, 431,915.45 and 98,352.67 is: 147,555.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,892.58 : 431,915.45 = 98,352.67 : x
  2. Step 2: Convert to fraction form
    287,892.58/431,915.45 = 98,352.67/x
  3. Step 3: Cross multiply
    287,892.58x = 431,915.45 × 98,352.67
  4. Step 4: Simplify right side
    287,892.58x = 42,480,037,721.75
  5. Step 5: Solve for x
    x = 42,480,037,721.75/287,892.58
  6. Step 6: Final answer
    x = 147,555.17

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1.5x scale

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.