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Finding the Fourth Proportional to 712,654.28, 983,463.16 and 390,369.64

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Solution

The fourth proportional to 712,654.28, 983,463.16 and 390,369.64 is: 538,710.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,654.28 : 983,463.16 = 390,369.64 : x
  2. Step 2: Convert to fraction form
    712,654.28/983,463.16 = 390,369.64/x
  3. Step 3: Cross multiply
    712,654.28x = 983,463.16 × 390,369.64
  4. Step 4: Simplify right side
    712,654.28x = 383,914,159,722.46
  5. Step 5: Solve for x
    x = 383,914,159,722.46/712,654.28
  6. Step 6: Final answer
    x = 538,710.24

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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.