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Finding the Fourth Proportional to 287,331.20, 430,413.60 and 162,526.40

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Solution

The fourth proportional to 287,331.20, 430,413.60 and 162,526.40 is: 243,459.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,331.20 : 430,413.60 = 162,526.40 : x
  2. Step 2: Convert to fraction form
    287,331.20/430,413.60 = 162,526.40/x
  3. Step 3: Cross multiply
    287,331.20x = 430,413.60 × 162,526.40
  4. Step 4: Simplify right side
    287,331.20x = 69,953,572,919.04
  5. Step 5: Solve for x
    x = 69,953,572,919.04/287,331.20
  6. Step 6: Final answer
    x = 243,459.72

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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.