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Finding the Fourth Proportional to 642,953.84, 887,326.45 and 356,529.74

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Solution

The fourth proportional to 642,953.84, 887,326.45 and 356,529.74 is: 492,038.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,953.84 : 887,326.45 = 356,529.74 : x
  2. Step 2: Convert to fraction form
    642,953.84/887,326.45 = 356,529.74/x
  3. Step 3: Cross multiply
    642,953.84x = 887,326.45 × 356,529.74
  4. Step 4: Simplify right side
    642,953.84x = 316,358,263,185.67
  5. Step 5: Solve for x
    x = 316,358,263,185.67/642,953.84
  6. Step 6: Final answer
    x = 492,038.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.