Home / 760,138.30-1,139,938.65-261,386.30

Finding the Fourth Proportional to 760,138.30, 1,139,938.65 and 261,386.30

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Solution

The fourth proportional to 760,138.30, 1,139,938.65 and 261,386.30 is: 391,987.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    760,138.30 : 1,139,938.65 = 261,386.30 : x
  2. Step 2: Convert to fraction form
    760,138.30/1,139,938.65 = 261,386.30/x
  3. Step 3: Cross multiply
    760,138.30x = 1,139,938.65 × 261,386.30
  4. Step 4: Simplify right side
    760,138.30x = 297,964,345,950.50
  5. Step 5: Solve for x
    x = 297,964,345,950.50/760,138.30
  6. Step 6: Final answer
    x = 391,987.02

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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.