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Finding the Fourth Proportional to 885,913,613.80, 1,328,870,420.70 and 425,740,820.20

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Solution

The fourth proportional to 885,913,613.80, 1,328,870,420.70 and 425,740,820.20 is: 638,611,230.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    885,913,613.80 : 1,328,870,420.70 = 425,740,820.20 : x
  2. Step 2: Convert to fraction form
    885,913,613.80/1,328,870,420.70 = 425,740,820.20/x
  3. Step 3: Cross multiply
    885,913,613.80x = 1,328,870,420.70 × 425,740,820.20
  4. Step 4: Simplify right side
    885,913,613.80x = 565,754,382,848,337,088
  5. Step 5: Solve for x
    x = 565,754,382,848,337,088/885,913,613.80
  6. Step 6: Final answer
    x = 638,611,230.30

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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.