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Finding the Fourth Proportional to 712,589.67, 983,362.88 and 390,298.77

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Solution

The fourth proportional to 712,589.67, 983,362.88 and 390,298.77 is: 538,606.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,589.67 : 983,362.88 = 390,298.77 : x
  2. Step 2: Convert to fraction form
    712,589.67/983,362.88 = 390,298.77/x
  3. Step 3: Cross multiply
    712,589.67x = 983,362.88 × 390,298.77
  4. Step 4: Simplify right side
    712,589.67x = 383,805,323,503.41
  5. Step 5: Solve for x
    x = 383,805,323,503.41/712,589.67
  6. Step 6: Final answer
    x = 538,606.35

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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.