Home / 1,272,017.78-1,908,114.99-430,284.98

Finding the Fourth Proportional to 1,272,017.78, 1,908,114.99 and 430,284.98

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Solution

The fourth proportional to 1,272,017.78, 1,908,114.99 and 430,284.98 is: 645,457.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,272,017.78 : 1,908,114.99 = 430,284.98 : x
  2. Step 2: Convert to fraction form
    1,272,017.78/1,908,114.99 = 430,284.98/x
  3. Step 3: Cross multiply
    1,272,017.78x = 1,908,114.99 × 430,284.98
  4. Step 4: Simplify right side
    1,272,017.78x = 821,033,220,309.85
  5. Step 5: Solve for x
    x = 821,033,220,309.85/1,272,017.78
  6. Step 6: Final answer
    x = 645,457.35

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Double scale
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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.