Home / 642,643.23-886,610.28-384,526.20

Finding the Fourth Proportional to 642,643.23, 886,610.28 and 384,526.20

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Solution

The fourth proportional to 642,643.23, 886,610.28 and 384,526.20 is: 530,504.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,643.23 : 886,610.28 = 384,526.20 : x
  2. Step 2: Convert to fraction form
    642,643.23/886,610.28 = 384,526.20/x
  3. Step 3: Cross multiply
    642,643.23x = 886,610.28 × 384,526.20
  4. Step 4: Simplify right side
    642,643.23x = 340,924,881,849.34
  5. Step 5: Solve for x
    x = 340,924,881,849.34/642,643.23
  6. Step 6: Final answer
    x = 530,504.12

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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.