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Finding the Fourth Proportional to 712,740.68, 983,606.62 and 390,450.68

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Solution

The fourth proportional to 712,740.68, 983,606.62 and 390,450.68 is: 538,835.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,740.68 : 983,606.62 = 390,450.68 : x
  2. Step 2: Convert to fraction form
    712,740.68/983,606.62 = 390,450.68/x
  3. Step 3: Cross multiply
    712,740.68x = 983,606.62 × 390,450.68
  4. Step 4: Simplify right side
    712,740.68x = 384,049,873,631.50
  5. Step 5: Solve for x
    x = 384,049,873,631.50/712,740.68
  6. Step 6: Final answer
    x = 538,835.35

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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.