Home / 692,587.72-955,784.34-390,788.68

Finding the Fourth Proportional to 692,587.72, 955,784.34 and 390,788.68

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Solution

The fourth proportional to 692,587.72, 955,784.34 and 390,788.68 is: 539,295.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    692,587.72 : 955,784.34 = 390,788.68 : x
  2. Step 2: Convert to fraction form
    692,587.72/955,784.34 = 390,788.68/x
  3. Step 3: Cross multiply
    692,587.72x = 955,784.34 × 390,788.68
  4. Step 4: Simplify right side
    692,587.72x = 373,509,700,593.27
  5. Step 5: Solve for x
    x = 373,509,700,593.27/692,587.72
  6. Step 6: Final answer
    x = 539,295.88

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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.