Home / 830,880.40-1,146,609.12-491,341.36

Finding the Fourth Proportional to 830,880.40, 1,146,609.12 and 491,341.36

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Solution

The fourth proportional to 830,880.40, 1,146,609.12 and 491,341.36 is: 678,047.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    830,880.40 : 1,146,609.12 = 491,341.36 : x
  2. Step 2: Convert to fraction form
    830,880.40/1,146,609.12 = 491,341.36/x
  3. Step 3: Cross multiply
    830,880.40x = 1,146,609.12 × 491,341.36
  4. Step 4: Simplify right side
    830,880.40x = 563,376,484,409.20
  5. Step 5: Solve for x
    x = 563,376,484,409.20/830,880.40
  6. Step 6: Final answer
    x = 678,047.63

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Half scale
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.