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Finding the Fourth Proportional to 712,594.78, 983,380.91 and 390,316.39

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Solution

The fourth proportional to 712,594.78, 983,380.91 and 390,316.39 is: 538,636.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,594.78 : 983,380.91 = 390,316.39 : x
  2. Step 2: Convert to fraction form
    712,594.78/983,380.91 = 390,316.39/x
  3. Step 3: Cross multiply
    712,594.78x = 983,380.91 × 390,316.39
  4. Step 4: Simplify right side
    712,594.78x = 383,829,682,376.08
  5. Step 5: Solve for x
    x = 383,829,682,376.08/712,594.78
  6. Step 6: Final answer
    x = 538,636.68

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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.