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Finding the Fourth Proportional to 423,075.80, 634,613.70 and 404,413.40

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Solution

The fourth proportional to 423,075.80, 634,613.70 and 404,413.40 is: 606,620.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,075.80 : 634,613.70 = 404,413.40 : x
  2. Step 2: Convert to fraction form
    423,075.80/634,613.70 = 404,413.40/x
  3. Step 3: Cross multiply
    423,075.80x = 634,613.70 × 404,413.40
  4. Step 4: Simplify right side
    423,075.80x = 256,646,284,103.58
  5. Step 5: Solve for x
    x = 256,646,284,103.58/423,075.80
  6. Step 6: Final answer
    x = 606,620.10

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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.