Home / 712,834.32-983,711.34-390,556.62

Finding the Fourth Proportional to 712,834.32, 983,711.34 and 390,556.62

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Solution

The fourth proportional to 712,834.32, 983,711.34 and 390,556.62 is: 538,968.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,834.32 : 983,711.34 = 390,556.62 : x
  2. Step 2: Convert to fraction form
    712,834.32/983,711.34 = 390,556.62/x
  3. Step 3: Cross multiply
    712,834.32x = 983,711.34 × 390,556.62
  4. Step 4: Simplify right side
    712,834.32x = 384,194,976,006.07
  5. Step 5: Solve for x
    x = 384,194,976,006.07/712,834.32
  6. Step 6: Final answer
    x = 538,968.12

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Double scale
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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.