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Finding the Fourth Proportional to 655,613.70, 983,420.55 and 578,631.30

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Solution

The fourth proportional to 655,613.70, 983,420.55 and 578,631.30 is: 867,946.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,613.70 : 983,420.55 = 578,631.30 : x
  2. Step 2: Convert to fraction form
    655,613.70/983,420.55 = 578,631.30/x
  3. Step 3: Cross multiply
    655,613.70x = 983,420.55 × 578,631.30
  4. Step 4: Simplify right side
    655,613.70x = 569,037,911,293.22
  5. Step 5: Solve for x
    x = 569,037,911,293.22/655,613.70
  6. Step 6: Final answer
    x = 867,946.95

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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.