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Finding the Fourth Proportional to 805,698.40, 1,209,422.40 and 506,516.80

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Solution

The fourth proportional to 805,698.40, 1,209,422.40 and 506,516.80 is: 760,325.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    805,698.40 : 1,209,422.40 = 506,516.80 : x
  2. Step 2: Convert to fraction form
    805,698.40/1,209,422.40 = 506,516.80/x
  3. Step 3: Cross multiply
    805,698.40x = 1,209,422.40 × 506,516.80
  4. Step 4: Simplify right side
    805,698.40x = 612,592,763,896.32
  5. Step 5: Solve for x
    x = 612,592,763,896.32/805,698.40
  6. Step 6: Final answer
    x = 760,325.16

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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.