Home / 287,729.40-431,594.10-243,442.65

Finding the Fourth Proportional to 287,729.40, 431,594.10 and 243,442.65

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Solution

The fourth proportional to 287,729.40, 431,594.10 and 243,442.65 is: 365,163.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,729.40 : 431,594.10 = 243,442.65 : x
  2. Step 2: Convert to fraction form
    287,729.40/431,594.10 = 243,442.65/x
  3. Step 3: Cross multiply
    287,729.40x = 431,594.10 × 243,442.65
  4. Step 4: Simplify right side
    287,729.40x = 105,068,411,428.37
  5. Step 5: Solve for x
    x = 105,068,411,428.37/287,729.40
  6. Step 6: Final answer
    x = 365,163.98

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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.