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Finding the Fourth Proportional to 540,248.40, 810,512.70 and 287,320.91

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Solution

The fourth proportional to 540,248.40, 810,512.70 and 287,320.91 is: 431,055.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    540,248.40 : 810,512.70 = 287,320.91 : x
  2. Step 2: Convert to fraction form
    540,248.40/810,512.70 = 287,320.91/x
  3. Step 3: Cross multiply
    540,248.40x = 810,512.70 × 287,320.91
  4. Step 4: Simplify right side
    540,248.40x = 232,877,242,477.99
  5. Step 5: Solve for x
    x = 232,877,242,477.99/540,248.40
  6. Step 6: Final answer
    x = 431,055.87

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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.