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Finding the Fourth Proportional to 712,624.84, 983,425.56 and 390,333.94

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Solution

The fourth proportional to 712,624.84, 983,425.56 and 390,333.94 is: 538,662.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,624.84 : 983,425.56 = 390,333.94 : x
  2. Step 2: Convert to fraction form
    712,624.84/983,425.56 = 390,333.94/x
  3. Step 3: Cross multiply
    712,624.84x = 983,425.56 × 390,333.94
  4. Step 4: Simplify right side
    712,624.84x = 383,864,369,609.19
  5. Step 5: Solve for x
    x = 383,864,369,609.19/712,624.84
  6. Step 6: Final answer
    x = 538,662.63

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1.5x scale

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.