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Finding the Fourth Proportional to 580,929.20, 811,642 and 580,929.20

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Solution

The fourth proportional to 580,929.20, 811,642 and 580,929.20 is: 811,642

Step by Step Solution

  1. Step 1: Write the proportion equation
    580,929.20 : 811,642 = 580,929.20 : x
  2. Step 2: Convert to fraction form
    580,929.20/811,642 = 580,929.20/x
  3. Step 3: Cross multiply
    580,929.20x = 811,642 × 580,929.20
  4. Step 4: Simplify right side
    580,929.20x = 471,506,537,746.40
  5. Step 5: Solve for x
    x = 471,506,537,746.40/580,929.20
  6. Step 6: Final answer
    x = 811,642

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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.