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Finding the Fourth Proportional to 712,588.52, 983,372.52 and 390,318.92

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Solution

The fourth proportional to 712,588.52, 983,372.52 and 390,318.92 is: 538,640.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,588.52 : 983,372.52 = 390,318.92 : x
  2. Step 2: Convert to fraction form
    712,588.52/983,372.52 = 390,318.92/x
  3. Step 3: Cross multiply
    712,588.52x = 983,372.52 × 390,318.92
  4. Step 4: Simplify right side
    712,588.52x = 383,828,899,964.08
  5. Step 5: Solve for x
    x = 383,828,899,964.08/712,588.52
  6. Step 6: Final answer
    x = 538,640.31

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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.