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Finding the Fourth Proportional to 910,411.40, 1,272,214 and 910,411.40

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Solution

The fourth proportional to 910,411.40, 1,272,214 and 910,411.40 is: 1,272,214

Step by Step Solution

  1. Step 1: Write the proportion equation
    910,411.40 : 1,272,214 = 910,411.40 : x
  2. Step 2: Convert to fraction form
    910,411.40/1,272,214 = 910,411.40/x
  3. Step 3: Cross multiply
    910,411.40x = 1,272,214 × 910,411.40
  4. Step 4: Simplify right side
    910,411.40x = 1,158,238,128,839.60
  5. Step 5: Solve for x
    x = 1,158,238,128,839.60/910,411.40
  6. Step 6: Final answer
    x = 1,272,214

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.