Home / 761,570.91-1,142,356.37-387,856.35

Finding the Fourth Proportional to 761,570.91, 1,142,356.37 and 387,856.35

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Solution

The fourth proportional to 761,570.91, 1,142,356.37 and 387,856.35 is: 581,784.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    761,570.91 : 1,142,356.37 = 387,856.35 : x
  2. Step 2: Convert to fraction form
    761,570.91/1,142,356.37 = 387,856.35/x
  3. Step 3: Cross multiply
    761,570.91x = 1,142,356.37 × 387,856.35
  4. Step 4: Simplify right side
    761,570.91x = 443,070,170,128.17
  5. Step 5: Solve for x
    x = 443,070,170,128.17/761,570.91
  6. Step 6: Final answer
    x = 581,784.53

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.