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Finding the Fourth Proportional to 578,531.20, 778,528.80 and 578,531.20

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Solution

The fourth proportional to 578,531.20, 778,528.80 and 578,531.20 is: 778,528.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,531.20 : 778,528.80 = 578,531.20 : x
  2. Step 2: Convert to fraction form
    578,531.20/778,528.80 = 578,531.20/x
  3. Step 3: Cross multiply
    578,531.20x = 778,528.80 × 578,531.20
  4. Step 4: Simplify right side
    578,531.20x = 450,403,200,898.56
  5. Step 5: Solve for x
    x = 450,403,200,898.56/578,531.20
  6. Step 6: Final answer
    x = 778,528.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.