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Finding the Fourth Proportional to 864,779.81, 1,297,036.64 and 288,413.22

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Solution

The fourth proportional to 864,779.81, 1,297,036.64 and 288,413.22 is: 432,575.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    864,779.81 : 1,297,036.64 = 288,413.22 : x
  2. Step 2: Convert to fraction form
    864,779.81/1,297,036.64 = 288,413.22/x
  3. Step 3: Cross multiply
    864,779.81x = 1,297,036.64 × 288,413.22
  4. Step 4: Simplify right side
    864,779.81x = 374,082,513,800.38
  5. Step 5: Solve for x
    x = 374,082,513,800.38/864,779.81
  6. Step 6: Final answer
    x = 432,575.45

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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.