Home / 712,700.01-983,526.18-390,421.56

Finding the Fourth Proportional to 712,700.01, 983,526.18 and 390,421.56

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Solution

The fourth proportional to 712,700.01, 983,526.18 and 390,421.56 is: 538,781.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,700.01 : 983,526.18 = 390,421.56 : x
  2. Step 2: Convert to fraction form
    712,700.01/983,526.18 = 390,421.56/x
  3. Step 3: Cross multiply
    712,700.01x = 983,526.18 × 390,421.56
  4. Step 4: Simplify right side
    712,700.01x = 383,989,825,496.44
  5. Step 5: Solve for x
    x = 383,989,825,496.44/712,700.01
  6. Step 6: Final answer
    x = 538,781.84

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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.