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Finding the Fourth Proportional to 712,590.67, 983,364.26 and 390,299.77

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Solution

The fourth proportional to 712,590.67, 983,364.26 and 390,299.77 is: 538,607.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,590.67 : 983,364.26 = 390,299.77 : x
  2. Step 2: Convert to fraction form
    712,590.67/983,364.26 = 390,299.77/x
  3. Step 3: Cross multiply
    712,590.67x = 983,364.26 × 390,299.77
  4. Step 4: Simplify right side
    712,590.67x = 383,806,844,504.22
  5. Step 5: Solve for x
    x = 383,806,844,504.22/712,590.67
  6. Step 6: Final answer
    x = 538,607.73

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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.