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Finding the Fourth Proportional to 712,613.79, 983,407.45 and 390,329.27

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Solution

The fourth proportional to 712,613.79, 983,407.45 and 390,329.27 is: 538,654.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,613.79 : 983,407.45 = 390,329.27 : x
  2. Step 2: Convert to fraction form
    712,613.79/983,407.45 = 390,329.27/x
  3. Step 3: Cross multiply
    712,613.79x = 983,407.45 × 390,329.27
  4. Step 4: Simplify right side
    712,613.79x = 383,852,707,568.23
  5. Step 5: Solve for x
    x = 383,852,707,568.23/712,613.79
  6. Step 6: Final answer
    x = 538,654.62

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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.