Home / 712,843.32-983,723.76-390,565.62

Finding the Fourth Proportional to 712,843.32, 983,723.76 and 390,565.62

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Solution

The fourth proportional to 712,843.32, 983,723.76 and 390,565.62 is: 538,980.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,843.32 : 983,723.76 = 390,565.62 : x
  2. Step 2: Convert to fraction form
    712,843.32/983,723.76 = 390,565.62/x
  3. Step 3: Cross multiply
    712,843.32x = 983,723.76 × 390,565.62
  4. Step 4: Simplify right side
    712,843.32x = 384,208,680,233.13
  5. Step 5: Solve for x
    x = 384,208,680,233.13/712,843.32
  6. Step 6: Final answer
    x = 538,980.54

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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.