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Finding the Fourth Proportional to 712,509.22, 983,262.73 and 390,220.09

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Solution

The fourth proportional to 712,509.22, 983,262.73 and 390,220.09 is: 538,503.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,509.22 : 983,262.73 = 390,220.09 : x
  2. Step 2: Convert to fraction form
    712,509.22/983,262.73 = 390,220.09/x
  3. Step 3: Cross multiply
    712,509.22x = 983,262.73 × 390,220.09
  4. Step 4: Simplify right side
    712,509.22x = 383,688,868,160.41
  5. Step 5: Solve for x
    x = 383,688,868,160.41/712,509.22
  6. Step 6: Final answer
    x = 538,503.72

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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.