Home / 830,516.20-1,247,156.70-456,807.40

Finding the Fourth Proportional to 830,516.20, 1,247,156.70 and 456,807.40

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Solution

The fourth proportional to 830,516.20, 1,247,156.70 and 456,807.40 is: 685,971.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    830,516.20 : 1,247,156.70 = 456,807.40 : x
  2. Step 2: Convert to fraction form
    830,516.20/1,247,156.70 = 456,807.40/x
  3. Step 3: Cross multiply
    830,516.20x = 1,247,156.70 × 456,807.40
  4. Step 4: Simplify right side
    830,516.20x = 569,710,409,519.58
  5. Step 5: Solve for x
    x = 569,710,409,519.58/830,516.20
  6. Step 6: Final answer
    x = 685,971.46

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Double scale
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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.