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Finding the Fourth Proportional to 651,638.70, 977,458.05 and 402,806.70

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Solution

The fourth proportional to 651,638.70, 977,458.05 and 402,806.70 is: 604,210.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,638.70 : 977,458.05 = 402,806.70 : x
  2. Step 2: Convert to fraction form
    651,638.70/977,458.05 = 402,806.70/x
  3. Step 3: Cross multiply
    651,638.70x = 977,458.05 × 402,806.70
  4. Step 4: Simplify right side
    651,638.70x = 393,726,651,508.94
  5. Step 5: Solve for x
    x = 393,726,651,508.94/651,638.70
  6. Step 6: Final answer
    x = 604,210.05

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Similar ratio
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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.