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Finding the Fourth Proportional to 712,842.32, 983,722.38 and 390,564.62

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Solution

The fourth proportional to 712,842.32, 983,722.38 and 390,564.62 is: 538,979.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,842.32 : 983,722.38 = 390,564.62 : x
  2. Step 2: Convert to fraction form
    712,842.32/983,722.38 = 390,564.62/x
  3. Step 3: Cross multiply
    712,842.32x = 983,722.38 × 390,564.62
  4. Step 4: Simplify right side
    712,842.32x = 384,207,157,530.20
  5. Step 5: Solve for x
    x = 384,207,157,530.20/712,842.32
  6. Step 6: Final answer
    x = 538,979.16

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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.